User: Hi, I'd like to buy some movie tickets
Assistant: Okay, what movie do you want to see?
User: 1917
Assistant: Okay, and where would you like to see it?
User: In West Chester
Assistant: Okay and how many tickets total?
User: 4 please
Assistant: Okay, and in standard or IMAX
User: IMAX please
Assistant: Okay and what time?
User: 7:00 PM
Assistant: Okay, I have you down for 2 tickets for 1917...
User: Wait, let's switch the number of tickets
Assistant: Okay, so you want a different number of tickets?
User: Yes, let's go with 6 tickets
Assistant: Okay, so 6 tickets instead of 4?