User: hi, I would like to buy tickets to see 1917
Assistant: Great! How many tickets do you need?
User: just two
Assistant: Great! Where would you like to see the movie?
User: I'm in downtown Manhattan, next to wall street
Assistant: Do you have a preferred screening type?
User: standard is fine... can I change the amounts of tickets?
Assistant: Yes you can. How many tickets do you need?
User: I'd to change it to three tickets
Assistant: OK, I've made the change.