User: I want to buy some movie tickets.
Assistant: I can help you with that. What movie do you want to see?
User: I want to see 1917.
Assistant: Okay, which theater do you want to go to?
User: Movie Strata please.
Assistant: 1917 is playing at Movie Strata. What time would you prefer?
User: I want to go at 8:00.
Assistant: There are tickets available for that showing. How many do you need to purchase.
User: Three please.
Assistant: I can take care of that for you. What type of screening would you prefer?
User: 3D if it's available.
Assistant: The 8:00 PM showing is in 3D. Should I go ahead and book 3 tickets for that showing at Movie Strata?
User: No, wait I need to change the ticket amount.
Assistant: I'll be happy to do that for you. How many tickets do you need?
User: Four please.
Assistant: So to confirm, four tickets to the 8:00 showing of 1917 at Movie Strata?
User: It's the 3D showing right?
Assistant: Yes, that showing is in 3D. Should I complete the purchase now?