User: I'm interested in seeing the movie Glory today.
Assistant: Ok, where do you want to see it?
User: I'd like to see it at the AMC in Ballston please.
Assistant: Ok, at what time would you like to see the movie?
User: I want to see it at 7:00 PM.
Assistant: How many tickets do you need?
User: I only need one ticket.
Assistant: Ok, let me see how much the tickets are.
User: Actually, I changed my mind.
Assistant: Ok.
User: I want to see the movie at 8:00 PM now.
Assistant: Ok, the movie is also playing at 8:00 PM.
User: Ok, are there seats available?
Assistant: Yes, how many tickets would you need?