User: I'd like to buy movie tickets for tonight.
Assistant: What movie would you like to see?
User: What is playing at Cinema Carousel?
Assistant: Frozen, Cats, Star Wars.
User: Hmm..Star Wars sounds good.
Assistant: They have showings at 6pm, 7pm, 8pm, 9pm.
User: I'd like tickets to the 8pm showing.
Assistant: What screen type would you like?
User: Standard.
Assistant: How many tickets?
User: Two.
Assistant: There are not tickets available for the 8pm showing of Star Wars on a standard screen. Would you like me to look at the IMAX screen?
User: Yes
Assistant: There are two tickets available for the 8pm showing on an IMAX screen.
User: Okay, lets go with those.
Assistant: Are you ready for me to purchase the tickets?
User: Yes.
Assistant: Two tickets have been purchased.