User: I think that is what I need but I would like to put the order in later just in case the meeting has us late
Assistant: Ok what time would you like me to wait until?
User: Go ahead and make the order by 4PM unless you hear differently from me.
Assistant: Ok I will order the 4 tickets at the Watertown IMAX movieplex for 6 PM, at 4 PM unless I hear from you that the plan has changed
User: That is correct
Assistant: Perfect it is scheduled
User: Thank you
Assistant: You're welcome, is there anything else I can do for you today.
User: No I believe that is it.
Assistant: Then consider it done.
User: Actually, assistant. I've changed my mind
Assistant: What do you need from me?
User: Can we make that purchase order for the tickets at 5 PM instead of 4 PM
Assistant: Yes we can do that.
User: Perfect
Assistant: So let me double check this now. You would like the same purchase of 4 tickets for the 6 PM movie in Watertown, and make the purchase at 5 PM.