User: Hey, is that new animation out yet?
Assistant: Which new animation?
User: It's a movie for kids.
Assistant: Do you mean Onward?
User: Yes. I need 3 tickets for tonight.
Assistant: Ok. Let me check for you.
User: Great.
Assistant: Onward is playing downtown at 5, 7 and 9 PM
User: Ok, get 3 tickets for the 7 showing.
Assistant: Ok. 3 tickets for Onward at downtown has been purchased for you.
User: Oh, wait. Actually can you see if they have 3D showing?
Assistant: Yes. They do have 3D showing but the tickets I bought are not for 3D.
User: Ok. Change them to 3D.
Assistant: Ok. 3 tickets for 3D showing of Onward at downtown?
User: That sounds perfect.
Assistant: Ok. I will have to cancel the regular showing tickets first. hold please.
User: Ok.
Assistant: Ok. i've canceled the 3 regular tickets and purchased 3 tickets for 3D showing of Onward at downtown at 7 PM.