User: Hey, do I have time this Saturday?
Assistant: Let me check your schedule.
User: Okay.
Assistant: Alright, it seems like you do have time only during the night.
User: Alright, I want to book movie tickets for Saturday night.
Assistant: Okay, which movie?
User: The Avengers.
Assistant: Oh, that's a great movie. Sure, how many people?
User: 2. It'll be me and my husband.
Assistant: Okay, perfect. What time?
User: What times are there?
Assistant: There's one at 6, 7, and 8 P.M.
User: I think 7 would be good.
Assistant: Okay, I'll book that.
User: Is there the movie in 3D?
Assistant: Yeah, there is.
User: Okay, I'd like that option.
Assistant: Alright, also, it seems like the 6 P.M is all booked.
User: Okay, can we change it to 8 P.M.?
Assistant: Yes, there are seats available. I'll book it now.