User: I'd like to go to the movies tonight
Assistant: Great! What movie would you like to see?
User: Star Wars
Assistant: OK great. What theater would you like to visit?
User: The megaplex close to me
Assistant: And how many tickets would you like?
User: Just one
Assistant: OK, one ticket. What time would you like to go?
User: Around 7
Assistant: There is a showing at 7:10pm
User: OK, let's book that one
Assistant: Great. Would you prefer the regular screen or IMAX?
User: Actually, is there a showing closer to 8pm?
Assistant: Yes, there is a showing at 8:15
User: Let's change to that one please
Assistant: OK, 8:15. Would you like a regular screen or IMAX?