Query: user: I would need a round trip flight to ATL. I want an economy ticket and will be returning on march 8th.
assistant: Where would you be leaving from and when would you be leaving?
user: I will be leaving from chi-town wednesday next week.
assistant: There is an american airlines flight that leaves at 5:20 pm. It returns at 9:15 pm and the tickets cost $135.
user: When does the flight return. I might change my mind about going so I need to know if the ticket is refundable.
assistant: The flight returns at 10:16 pm. I am sorry, but the ticket is non-refundable.
user: Would I be able to get an earlier flight?
assistant: There is an delta airlines flight that leaves at 8:30 am. It returns at 3:40 pm and the tickets cost $188.
user: That is what I am looking for.
assistant: Is there anything else you need?
user: I need 1 ticket.

Intent: Flights:ReserveRoundtripFlights