Query: user: I need for find a friendly round-trip flight for my elderly grandparents and myself. Would you walk through this with me, please?
assistant: I'm happy to help. What's your flight date and where are you going?
user: Well, short notice for you, but today is the day, going to Los Angeles, please?
assistant: What's your departure city and when are you returning?
user: We want to fly out of Washington and return on the 11th of March.
assistant: Got it. American Airlines is offering a round-trip flight, leaving at 2:50 pm and returning at 5:20 am for $297 per passenger.
user: Do you show any other flights with three seats available?
assistant: Delta Airlines has a round-trip flight, leaving at 10 am and returning at 4 am for $207 per passenger.
user: Okay, I'll go with that flight, please.
assistant: Are you ready to purchase tickets for the trip?
user: Yes, let's do it.
assistant: Sure thing. Do you want to confirm a Delta Airlines Economy round-trip flight for 3 passengers, flying out of Washington on March 1st at 10 am and arriving in Los Angeles, with a return flight scheduled for March 11th at 4 am?
user: Go ahead and set that in stone, please. What's the airport for the arrival and can I get a refund if I need to?

Intent: Flights:ReserveRoundtripFlights