User: Need tickets to see Knives Out.
Assistant: At which theater?
User: AMC
Assistant: What time would you like to go?
User: 9:00 PM
Assistant: Okay, and how many tickets?
User: I need 3.
Assistant: There is a showing at 9:30 PM, does that work?
User: Yes, that time is good.
Assistant: Knives Out, at 9:30 PM, tickets for 3, at AMC. Confirmed?
User: Wait, actually that the number has changed. I only need 2 tickets.
Assistant: Okay, changing from 3 tickets to 2 tickets.