Czy możesz załatwić rezerwację na sobotę, czy nie masz kiedy zadzwonić?

The two czy do different jobs here.

• The first czy turns the sentence into a yes/no question: Czy możesz... = Can you...?
• The second czy connects two alternatives: ..., czy nie masz kiedy zadzwonić? = ..., or do you not have a chance to call?

So in this sentence, the first czy is a question particle, and the second one works more like or / or whether.

Polish usually leaves out subject pronouns when they are obvious from the verb ending.

• możesz already means you can
• masz already means you have

So ty is unnecessary unless you want emphasis or contrast:

• Czy ty możesz załatwić rezerwację...? = emphasizes you
• neutral Polish usually just says Czy możesz załatwić rezerwację...?

Because Polish verb endings show the person and number.

• możesz = you can (2nd person singular)
• masz = you have (2nd person singular)

A native speaker immediately hears the -sz ending and knows the subject is you.

Załatwić is a very common Polish verb meaning something like:

• arrange
• take care of
• sort out
• get done

In this sentence, it means arranging or taking care of the reservation.

It is a very natural everyday verb, but it is a little broader and more colloquial than a more exact verb like zarezerwować or zorganizować. Polish speakers use załatwić a lot when they mean getting something handled successfully.

Because rezerwację is the accusative case, which is used for the direct object of the verb.

The dictionary form is:

• rezerwacja = reservation

But after załatwić you need the object form:

• załatwić rezerwację = to arrange the reservation

For many feminine nouns ending in -a, the accusative singular changes to -ę:

• rezerwacja → rezerwację
• kawa → kawę

Because na sobotę means for Saturday, while w sobotę means on Saturday.

That is an important difference:

• rezerwacja na sobotę = a reservation for Saturday
• zadzwonię w sobotę = I’ll call on Saturday

So here na sobotę shows the reservation is intended for that day.

Literally, it is close to you don’t have when to call, but in natural English it means:

• you don’t have time to call
• you don’t have a chance to call
• there’s no moment when you can call

This is a common Polish structure:

• nie mieć kiedy + infinitive

Examples:

• Nie mam kiedy odpocząć. = I don’t have time/chance to rest.
• Nie mamy kiedy się spotkać. = We don’t have a chance to meet.

So kiedy here is not asking when? It is part of an idiomatic expression.

Because zadzwonić is perfective and usually refers to one completed phone call.

• dzwonić = to be calling / to call repeatedly / to call in general
• zadzwonić = to make one call successfully

In this sentence, the idea is a single practical action: making the call. That is why zadzwonić sounds natural.

It can be, depending on tone.

The structure ..., czy nie masz kiedy zadzwonić? may sound like:

• a genuine alternative
• mild impatience
• a suggestion that calling should be possible

So the speaker may simply be asking, but the sentence can also imply something like:

• Can you do it, or do you really not have a moment to call?

Tone of voice matters a lot here.

Because Polish uses the infinitive directly after many verbs and expressions.

For example:

• możesz załatwić = you can arrange
• masz kiedy zadzwonić = you have a chance/time to call

English usually needs to before the infinitive in many structures, but Polish often does not.

Yes. Polish yes/no questions can often be formed just by intonation.

So both of these are possible:

• Czy możesz załatwić rezerwację na sobotę...?
• Możesz załatwić rezerwację na sobotę...?

The version with czy makes the yes/no question more explicit. The version without it is also very common in speech.

Because the sentence contains two clauses joined together:

• Czy możesz załatwić rezerwację na sobotę
• czy nie masz kiedy zadzwonić

In writing, Polish normally separates such clauses with a comma. So the comma helps show that the speaker is presenting two alternatives within one larger question.