User: I need some movie tickets.
Assistant: What movie do you want to see?
User: Cats.
Assistant: Where would you like to see it?
User: Chicago, Illinois.
Assistant: What time would you like to watch it?
User: 5:00 PM
Assistant: How many tickets will you need?
User: Just 2.
Assistant: Will you need 2 adult tickets?
User: Yes.
Assistant: What screening type would you like?
User: 3D
Assistant: You want 2 tickets to see Cats in Chicago at 5:00 PM over a 3D screen. Is this right?
User: No. I'd like to change the screening type.
Assistant: Okay. What screening type do you want?
User: IMAX.
Assistant: Your screening type has been changed to IMAX. Would you like to change anything else?