Pouvez-vous me dire s’il y a encore un paquet à retirer, madame ?

Both are possible, but they do slightly different jobs.

• Pouvez-vous... ? is the inverted question form, which is more formal and polished.
• Vous pouvez... ? can also be used as a question in spoken French, but it sounds a little less formal.

So:

• Pouvez-vous me dire... ? = a polite, standard way to ask
• Vous pouvez me dire... ? = also possible, especially in conversation

Because the sentence ends with madame, the whole thing is clearly very polite, so Pouvez-vous fits well.

Me is the object pronoun meaning to me.

After a conjugated verb like pouvez, object pronouns usually come directly before the infinitive when that infinitive belongs closely to the first verb:

• Pouvez-vous me dire... = Can you tell me...

You would not normally say moi dire here, because moi is the stressed pronoun, used in different situations, such as emphasis:

• Moi, je ne sais pas. = Me, I don’t know.
• Vous parlez à moi ? is not standard; normally vous me parlez ?

So me dire is the normal grammar pattern.

S’il is a contraction of si il.

French usually contracts si il to s’il for ease of pronunciation:

• s’il y a = if there is / whether there is

So:

• si = if / whether
• il y a = there is / there are
• s’il y a = if there is / whether there is

This contraction is very common and standard.

Il y a is a fixed French expression meaning there is or there are.

Literally, its pieces are not very transparent to an English speaker:

• il = it/he
• y = there
• a = has

But you should learn il y a as one whole unit meaning:

• there is
• there are

Examples:

• Il y a un problème. = There is a problem.
• Il y a deux lettres. = There are two letters.

In your sentence, s’il y a encore un paquet means whether there is still another package / whether there is still a package.

Here, encore means still or any more, depending on how you translate it naturally into English.

In this sentence, it suggests that the speaker is asking whether there remains another package to collect.

Some common meanings of encore are:

• still
• again
• sometimes more

Examples:

• Il est encore là. = He is still there.
• Encore une fois. = One more time / Again.

So in this sentence, encore is not again. It means something like still or left to be collected.

Un paquet means a package or one package, so it is indefinite.

That suggests the speaker is asking whether there is some package still waiting to be collected, not referring to one already clearly identified in the grammar of the sentence.

Compare:

• un paquet = a package
• le paquet = the package

Using un paquet can sound natural when the speaker does not know for certain whether such a package exists, or is asking generally if there is one left.

À retirer means something like to be collected, to pick up, or for collection, depending on context.

This is a very common French structure:

• noun + à + infinitive

It often describes something that is pending, necessary, or available to be done.

So:

• un paquet à retirer = a package to collect / a package to be picked up

Similar examples:

• une lettre à envoyer = a letter to send
• du travail à faire = work to do
• un document à signer = a document to sign

In English, we often translate this with to + verb or to be + past participle.

Because noun + à + infinitive is the normal and idiomatic French structure here.

• un paquet à retirer = a package to collect
• un document à lire = a document to read

Using pour retirer would change the meaning. Pour usually expresses purpose:

• un ticket pour retirer un colis = a slip to collect a parcel

But that is different from saying the package itself is awaiting collection.

So à retirer is the right choice because it describes the package as something that remains to be collected.

Both words exist, but they are not always used in exactly the same way.

• paquet often means package, packet, or parcel in a broad sense.
• colis is often used for a parcel, especially in postal or delivery contexts.

In many real-life situations involving the post office, delivery services, or pickup points, colis may sound more idiomatic than paquet.

So a learner might also hear:

• s’il y a encore un colis à retirer

That said, paquet is perfectly understandable. The best word can depend on region and situation.

Madame is a polite form of address, like madam or ma’am.

Placing it at the end softens the request and makes it sound courteous:

• Pouvez-vous me dire..., madame ?

It is similar to saying:

• Can you tell me..., ma’am?

This is especially appropriate in formal service situations, such as at a counter, in a shop, or in an office.

It is quite formal and polite.

The signs of formality are:

• vous instead of tu
• inversion in Pouvez-vous
• the use of madame
• the overall careful phrasing

A less formal version might be:

• Vous pouvez me dire s’il y a encore un paquet à retirer ?

A more casual version with tu would be:

• Tu peux me dire s’il y a encore un paquet à retirer ?

So the original sentence is well suited to speaking politely to someone you do not know well.

It is both, in a way.

The whole sentence is a direct yes/no question:

• Pouvez-vous me dire...? = Can you tell me...?

Inside it, s’il y a encore un paquet à retirer is an indirect question introduced by si, meaning whether / if:

• ...whether there is still a package to collect

So the structure is:

• main question: Can you tell me... ?
• embedded question: whether there is still a package to collect

This is a very common French pattern.

In normal speech, s’il y a is usually pronounced very smoothly, almost as one chunk.

You may hear something close to:

• seel ya

Not as three heavily separated words.

That is because:

• s’il is already a contraction
• il y a is a very common fixed expression
• French naturally links sounds together in speech

So when listening, try to recognize s’il y a as one familiar pattern rather than analyzing each word separately every time.