User: Hey, can you help me book tickets for a movie?
Assistant: Sure I can assist. What movie would you like to see?
User: I think I want to see Dolittle. I heard good things about it.
Assistant: Great movie choice. And do you already have a preference for the movie theater?
User: Yes, choose the theater closest to my location in Dallas at 8:00 PM.
Assistant: And how many people will be accompanying you?
User: I need tickets for 4 people.
Assistant: Any viewing preferences for the showing?
User: Oh yeah! Can you choose an IMAX showing.
Assistant: Sure, give me one second to get everything booked for you.
User: On second thought, I think everyone wants to see more action and Dolittle might not be a good choice.
Assistant: Would you like to change your movie selection before everything is finalized?
User: Yes I think I would.
Assistant: What movie would you like to see instead?