¿Podría usted decirme qué butacas quedan libres para el documental de las ocho?

Podría is the conditional form of poder, and here it makes the request more polite and less direct.

• ¿Puede usted decirme...? = Can you tell me...?
• ¿Podría usted decirme...? = Could you tell me...?

In Spanish, just like in English, using could instead of can often sounds more courteous, especially in formal situations like speaking to cinema staff.

Yes, Spanish often leaves out subject pronouns because the verb ending already shows the person. So you could simply say:

• ¿Podría decirme...?

The sentence includes usted to make the formality especially clear. It adds emphasis to the respectful tone. In everyday speech, it is common to omit it unless the speaker wants to sound particularly formal or clear.

Decirme is made up of:

• decir = to tell / to say
• me = to me

So decirme literally means to tell me.

In Spanish, object pronouns like me can attach to an infinitive:

• podría usted decirme...

They can also go before the conjugated verb:

• ¿Me podría usted decir...?
• ¿Podría usted decirme...?

Both are correct.

It has an accent because it is an interrogative word, meaning which / what in a question.

Here it appears in an embedded question:

• qué butacas quedan libres

Even though that part is inside a larger sentence, it is still asking a question indirectly, so qué keeps the accent.

Compare:

• No sé qué butacas quedan libres. = I don’t know which seats are free.
• La película que vimos ayer... = The film that we saw yesterday...

In the second example, que is a relative pronoun, not a question word, so it has no accent.

In Spanish, qué is normally used directly before a noun:

• qué butacas = which seats

Cuáles usually stands on its own, not directly before the noun:

• ¿Cuáles quedan libres? = Which ones are free?

So in this sentence, qué butacas is the natural choice because the noun butacas is stated explicitly.

Butacas means seats, especially individual seats in places like:

• cinemas
• theatres
• auditoriums

Asientos is a more general word for seats. In a cinema context, butacas sounds very natural in Spain because it refers specifically to the numbered seats for audience members.

So:

• butacas = cinema/theatre seats
• asientos = seats in general

Literally, quedan libres means something like remain free or are left available.

• quedar often means to remain / to be left
• libres means free / available

So the phrase is asking which seats are still available.

This is very common in Spanish when talking about availability:

• Quedan dos entradas. = There are two tickets left.
• No quedan mesas libres. = There are no free tables left.

Both can make sense, but they are not exactly the same.

• quedan libres focuses on what is still available out of the total
• están libres simply describes the current state of the seats

In a booking or ticket-office context, quedan libres is especially natural because it suggests availability after some seats may already have been taken.

So this sentence sounds like: Which seats are still available for the 8 o’clock documentary?

Here, para means for:

• para el documental = for the documentary

This tells us the seats are being asked about in relation to that specific film showing.

The phrase de las ocho means the one at eight o’clock or the 8 o’clock one.

So:

• el documental de las ocho = the documentary showing at eight

Good question. The two expressions do different jobs.

• a las ocho = at eight o’clock → used to say when something happens
• de las ocho = the one at eight o’clock → used to identify which showing or session

Compare:

• El documental empieza a las ocho. = The documentary starts at eight.
• Quiero entradas para el documental de las ocho. = I want tickets for the 8 o’clock documentary.

In your sentence, the speaker is identifying a specific screening, so de las ocho is the right choice.

Yes. Spanish allows some flexibility, especially with pronouns and usted.

These are all possible:

• ¿Podría usted decirme qué butacas quedan libres para el documental de las ocho?
• ¿Podría decirme usted qué butacas quedan libres para el documental de las ocho?
• ¿Me podría decir qué butacas quedan libres para el documental de las ocho?

They all mean essentially the same thing. The original version sounds formal and very natural.

Because it agrees with butacas, which is plural and feminine.

• singular: butaca libre = free seat
• plural: butacas libres = free seats

Spanish adjectives must agree in number, and often gender, with the noun they describe.

The whole sentence is a direct question, because the speaker is directly asking someone something:

• ¿Podría usted decirme...?

Inside it, there is an embedded or indirect question:

• qué butacas quedan libres

That inner part is not surrounded by its own question marks, but it still uses the interrogative qué with an accent because it is asking which seats.

Yes, it sounds natural and polite in Spain, especially in a formal situation such as speaking to cinema staff.

A slightly less formal but still polite version might be:

• ¿Me puede decir qué butacas quedan libres para el documental de las ocho?

And a very formal version is the one you have:

• ¿Podría usted decirme qué butacas quedan libres para el documental de las ocho?

So the sentence is correct, natural, and appropriately formal.