User: Hello. I'd like some movie tickets.
Assistant: Hi. What movie would you like to watch?
User: Cats
Assistant: What theater would you like to watch Cats at?
User: AMC Fairlane 21.
Assistant: How many tickets will you need?
User: 2 tickets.
Assistant: What time would you like to watch the movie?
User: 7:00 PM.
Assistant: What type of screening would you like?
User: Wait, I'd like to change the showtime.
Assistant: Okay. What showtime would you like?
User: 9:00 PM.
Assistant: Thank you. What type of screening would you like?