User: I want to see a movie tonight.
Assistant: Which theater?
User: AMC Northpark 15.
Assistant: How many tickets?
User: I need two tickets.
Assistant: Which movie?
User: The Invisible Man.
Assistant: What time for?
User: Is there a showing at 9pm?
Assistant: I have one at 9:15.
User: What kind of showing is it?
Assistant: It is a standard showing.
User: That works.
Assistant: Let me book it.
User: Actually I prefer a 3D version.
Assistant: There is a 3D showing but not till 10pm.