Query: user: Can you help me find a round trip flight? I prefer to fly with Delta Airlines.
assistant: Where do you want to visit? When will you be coming back?
user: I need to go to Los Angeles and I need to arrive back on the 10th of this month.
assistant: When are you leaving? Where are you leaving from?
user: I leave on March 3rd from Vancouver. I'd prefer to fly premium economy.
assistant: I found 1 good Delta Airlines flight. The outbound leaves at 3:20 am and the return leaves at 10:55 am. It costs $219.
user: Is the ticket refundable? When does the onward flight arrive?
assistant: The onward flight arrives at 6:24 am. The ticket is not refundable.
user: That sounds good to me. Can you buy it for me?
assistant: Please confirm: 1 seat on the flight from Vancouver to Los Angeles via Delta Airlines on March 3rd and March 10th. The onward flight will leave at 3:20 am and the return flight will depart at 10:55 am. You'll be traveling in premium economy.
user: Yes, that sounds correct. Which airports does it travel between?
assistant: Your ticket is confirmed. It travels between YVR International Airport and LAX International Airport.
user: Thanks so much for your help.

Intent: Flights:ReserveRoundtripFlights