User: Hello there, please help me find some movie tickets.
Assistant: Hello, what movie would you like to watch?
User: I'm interested in watching something critically acclaimed, so 1917 seems good.
Assistant: Is there a particular theater where you want to watch 1917?
User: No, but I'm in Chicago, can you help me find a theater playing it?
Assistant: The AMC is playing 1917 in various formats throughout the day, do you have a specific time you like?
User: I think 5:00 PM would be good, can you tell me about what formats there are?
Assistant: There is a 5:00 PM showing. The formats are IMAX, 3D, and standard.
User: I think I'd like to see it in IMAX.
Assistant: How many tickets would you like?
User: I need 3 tickets.
Assistant: So you would like 3 tickets for 1917 on IMAX at AMC Chicago at 5:00 PM?
User: Actually, both my friends really like 3D, can you switch the tickets to 3D?
Assistant: I will get you 3 tickets for 1917 in 3D at AMC Chicago at 5:00 PM?
User: Yes, that's exactly what I want.
Assistant: How would you like to pay for the purchase?