User: hi, i'd like to buy a movie ticket
Assistant: Good day, which movie would you like to see?
User: I'd like to see 1917
Assistant: How may tickets would you like to purchase.
User: I need two
Assistant: What time would you like to see the movie?
User: at around 6:30 PM
Assistant: Where would you like to see the movie?
User: I'm in the west village and would like to see the movie here.
Assistant: Do you have a screening preference?
User: no, standard is fine
Assistant: ok, two tickets to 1917 at 6:30 PM in the west village.
User: can i change my screening preference
Assistant: Yes, you can.