User: I want to go watch the movie 1917 tonight.
Assistant: What city are you in?
User: I am in Miami.
Assistant: What theater are you interested in?
User: AMC near Bayfront.
Assistant: What showtime are you looking for?
User: 10:00 PM
Assistant: Do you have a screening preference?
User: No, I dont have one.
Assistant: Finally, how many tickets will you be needing?
User: Six tickets.
Assistant: I'll put this in search and get back to you soon.
User: Before you search I have changed my mind and wanted to watch the movie Just Mercy instead. All the same option.
Assistant: Ok, I will make sure and search that for you.