User: Hi, I'd like to buy some movie tickets
Assistant: Okay, what movie do you want to see?
User: Bad Boys
Assistant: Okay and at what time?
User: 7:00 PM
Assistant: And where would you like to see it?
User: AMC West Chester
Assistant: Okay and how many tickets?
User: 2 please
Assistant: and in standard or IMAX
User: standard works
Assistant: Okay, I have you down for 2 tickets...
User: Wait, let's switch that to 4 tickets
Assistant: Okay, now you want 4 tickets instead of 2
User: Yes, that's right
Assistant: Okay, I have you down for 4 tickets to see Bad Boys at 7 pm at AMC West Chester in standard.