Query: user: I would like a flight ticket.
assistant: Do you have a preferred airline such as Air Canada, Air France, or other airline? When are you returning?
user: I want to fly on Delta Airlines and return on Tuesday next week.
assistant: Where are you leaving from? What time do you want the return flight?
user: There are 4 of us leaving from LA. We want a return flight around 17:00.
assistant: When are you leaving?
user: I want to fly on American Airlines on the 1st of this month.
assistant: Where are you flying to?
user: I want to leave for Philadelphia around evening 6:30.
assistant: Please confirm you want 4 tickets to fly from Los Angeles to Philadelphia on American Airlines in economy, departing today at 6:30 pm and returning next Tuesday at 5 pm.
user: That is perfect.
assistant: The reservation was unsuccessful. Do you need anything else?
user: Please reserve me a plane ticket from Portland.
assistant: Please confirm you want 4 tickets to fly from Portland to Philadelphia on American Airlines in economy, departing today at 6:30 pm and returning next Tuesday at 5 pm.
user: That is perfect.
assistant: I could not buy the ticket. Do you need anything else?
user: No, that will be all.

Intent: oos