User: I'd love to watch a movie tonight, Friday the 14th.
Assistant: What is the name of the movie you want to see?
User: 1917
Assistant: What time do you want to see it?
User: 8:00 PM
Assistant: What theater do you want to see it in?
User: AMC in Hollywood.
Assistant: How many tickets do you need?
User: Just 2 of them.
Assistant: Would you like to have a special screening for this?
User: Yes, I want to watch it in 3D. I also think I told you 8pm. I need to have that changed to 10pm.
Assistant: You did, and I will change the time for you. I am ready to search now as I have all I need.
User: OK, thank you very much.
Assistant: You seem to be in luck as they have what you want for the 10pm showing. Not for 8pm though as you has previously wanted before your change.