Query: user: I need a one way flight.
assistant: Departure city and date? Destination?
user: Leaving Washington the 1st of March, going to Philly.
assistant: I found 3 flights. There's an American Airlines flight with 1 stop at 8 am for $138.
user: When does it get in?
assistant: 11:36 am.
user: Ok. Book it.
assistant: Please confirm: 1 economy ticket on American Airlines March 1st from Washington to Philadelphia.
user: Good. Is it refundable?
assistant: Your ticket is reserved and is refundable.
user: What's the departure airport?

Intent: Flights:ReserveOnewayFlight