How much are the tickets?
Is it in English?
I haven't seen it.
I've heard about it.
I've heard it's really good.
We need to book the tickets as soon as possible.
You can book the tickets on-line. You get a discount.
Do we get a discount if...?
Sold out. No tickets.
Tickets are SOLD OUT!
Tickets are sold out for the month of February but we can still book for March.
The tickets have been a sold out smash. We can't go.
Once these tickets are sold out, the only other way you would be able to get tickets is to go to the ticket booth/office 30 min before the play starts, in case any of the people who booked beforehand fails to arrive.

(Due to the play's spectacular success) The play's (has) been extended to the end of March.
The play's (Saxon Genitive) run/season has been extended to/till the end of March // for three weeks.

I'll go straight to the theater, so don't wait for me. I'm driving. / I'm taking my car.