Sutra ću ponovo razgovarati sa kasirkom o ceni kaputa.

This is the future I tense in Serbian.

It is formed with:

• the clitic form of hteti (ću, ćeš, će, ćemo, ćete, će)
• plus the infinitive

So here:

• ću = I will
• razgovarati = to talk / to speak

Together, ću razgovarati means I will talk.

The full pattern is:

• ja ću razgovarati = I will talk
• ti ćeš razgovarati = you will talk
• on/ona/ono će razgovarati = he/she/it will talk

In this sentence, ja is omitted because Serbian often leaves out subject pronouns when they are clear from the verb form.

This happens because ću is a clitic, and clitics in Serbian usually go in the second position of the sentence or clause.

So in:

• Sutra ću ponovo razgovarati...

the first element is Sutra (tomorrow), and ću comes right after it.

This is very normal Serbian word order.

Compare:

• Ja ću sutra razgovarati... = I will talk tomorrow...
• Sutra ću razgovarati... = Tomorrow I will talk...
• Ponovo ću razgovarati... = I will talk again...

In each case, ću tends to come after the first element.

Sutra ću razgovarati is the normal and standard choice here.

You may also see forms where the future auxiliary is attached to the infinitive, such as:

• razgovaraću = I will talk

But in a sentence like this, Sutra ću razgovarati... is much more natural than Sutra razgovaraću...

So for learners, the safest version is:

• Sutra ću ponovo razgovarati...

That is the most useful and standard pattern to copy.

Ponovo means again.

So:

• Sutra ću ponovo razgovarati... = Tomorrow I will talk again...

Its position is fairly flexible, but some placements sound more natural than others. For example:

• Sutra ću ponovo razgovarati sa kasirkom.
• Sutra ću razgovarati ponovo sa kasirkom.
  This is possible, but less natural in many contexts.

The version in your sentence is very normal.

A near-synonym is opet, which also often means again:

• Sutra ću opet razgovarati sa kasirkom...

Kasirkom is in the instrumental singular.

The preposition sa (or short s) often means with, and when it means with, it requires the instrumental case.

So:

• kasirka = cashier
• sa kasirkom = with the cashier

This is why the ending changes:

• nominative: kasirka
• instrumental: kasirkom

This is a very common pattern:

• sa prijateljem = with a friend
• sa sestrom = with my sister
• sa profesorkom = with the professor

Both s and sa can mean with.

In practice:

• s is the shorter form
• sa is used when pronunciation is easier that way, especially before certain consonant combinations

So Serbian often prefers sa before words where s would sound awkward.

That is why sa kasirkom is natural.

You should think of sa here as the normal pronunciation-friendly version of s.

After the preposition o meaning about, Serbian uses the locative case.

So:

• cena = price
• o ceni = about the price

The form ceni is the locative singular of cena.

Examples of the same pattern:

• pričam o knjizi = I am talking about the book
• razmišljam o poslu = I am thinking about work
• govorimo o problemu = we are speaking about the problem

So in your sentence:

• o ceni kaputa = about the price of the coat

Kaputa is the genitive singular of kaput.

It is used because Serbian often expresses of relationships with the genitive case.

So:

• kaput = coat
• cena kaputa = the price of the coat

Literally, this is like:

• price + of coat

That is why:

• o ceni kaputa = about the price of the coat

This pattern is extremely common:

• boja auta = the color of the car
• vrata kuće = the door of the house
• ime grada = the name of the city

Because razgovarati often works with two different kinds of complements:

• razgovarati sa + instrumental = to talk with someone
• razgovarati o + locative = to talk about something

So this sentence combines both:

• sa kasirkom = with the cashier
• o ceni kaputa = about the price of the coat

Together:

• razgovarati sa kasirkom o ceni kaputa
  = to talk with the cashier about the price of the coat

This is a very useful pattern to remember.

Razgovarati is imperfective.

That matters because in Serbian, when you are talking about a general action, a planned conversation, or the process of talking, the imperfective verb is often the natural choice.

Here, the sentence simply says that the speaker will talk again tomorrow. It does not focus on the conversation as a single completed event in the same way a perfective verb would.

For learners, the key thing is:

• razgovarati = to talk / to have a conversation
• it is the normal verb to use in many future statements like this one

Yes, you can.

• Ja ću sutra ponovo razgovarati sa kasirkom o ceni kaputa.

This is grammatically correct.

But Serbian often omits subject pronouns unless they are needed for:

• emphasis
• contrast
• clarity

So without special emphasis, the shorter version is more natural:

• Sutra ću ponovo razgovarati sa kasirkom o ceni kaputa.

If you say ja, it can sound like:

• I will talk again tomorrow
  maybe not someone else

A useful breakdown is:

• Sutra = tomorrow
• ću = will
• ponovo = again
• razgovarati = talk
• sa kasirkom = with the cashier
• o ceni kaputa = about the price of the coat

So the structure is roughly:

time + future clitic + adverb + verb + with whom + about what

Serbian word order is more flexible than English, but this version sounds natural and clear.

English speakers should not expect Serbian to always match English word order exactly, especially because:

• clitics like ću have special placement rules
• case endings make word order more flexible

There are several useful case forms here:

• Sutra — an adverb, not a case form here
• ću — auxiliary clitic
• ponovo — adverb
• razgovarati — infinitive
• sa kasirkom — instrumental singular
• o ceni — locative singular
• kaputa — genitive singular

So this one sentence is a good example of how Serbian uses different cases after different prepositions and in noun relationships.

Yes, kasirka is a normal word for a female cashier.

Its masculine counterpart is:

• kasir = male cashier

Since the sentence uses kasirkom, we know the cashier is female.

This is because Serbian nouns often show grammatical gender clearly, and the case ending changes from the dictionary form:

• kasirka → kasirkom

Here are useful comparisons:

Present

• Ponovo razgovaram sa kasirkom o ceni kaputa.
• I am talking again / I talk again with the cashier about the price of the coat.

Past

• Ponovo sam razgovarala sa kasirkom o ceni kaputa.
  if the speaker is female
• Ponovo sam razgovarao sa kasirkom o ceni kaputa.
  if the speaker is male

Future

• Sutra ću ponovo razgovarati sa kasirkom o ceni kaputa.

This helps you see that the key idea stays the same, while the tense changes.