User: 4 tickets to Birds of Prey, please.
Assistant: What theater?
User: Regal Opry Mills.
Assistant: This movie is being shown all day long, is there a time you'd like?
User: At 5:00pm.
Assistant: At that time, there is a showing in 3D and Standard, would you like more information?
User: Nah, I just want standard.
Assistant: This is for today, correct?
User: Yes, can you give me the information so far?
Assistant: I can. 4 tickets to Birds of Prey at Regal Opry Mills at 5:00pm today. Is that correct so far?
User: That's correct, but can I change one thing?
Assistant: Yea, of course
User: I want 3D tickets now.
Assistant: Do you want all 4 tickets to be changed?
User: Yes.
Assistant: Ok, they have been changed to 3D tickets for Birds of Prey at 5:00pm.