User: hi, i would like to buy a ticket for the joker
Assistant: Great, how many tickets will you be buying?
User: just two
Assistant: What time do you want to book the ticket for?
User: for 6:00 PM
Assistant: What location do you want to see the movie in?
User: we would want tickets in downtown Manhattan
Assistant: Do you have a preferred screening type?
User: no
Assistant: Please confirm: two tickets to Joker at 6:00 PM in downtown Manhattan?
User: sorry i need to change the time
Assistant: That's fine, when would you like to book the ticket for.
User: Can I change it to 6:30 PM
Assistant: Let me search for available times
User: okay thanks
Assistant: That particular time is available