Query: user: Can you help me find a round-trip flights to Sydney, NSW?
assistant: When would you like to leave? Where will you be leaving from?
user: I will be leaving from San Diego on the day after tomorrow.
assistant: When will you return?
user: I am returning on the 14th.
assistant: Delta Airlines has a flight leaving at 11:05 am for $299. The return flight leaves at 5:50 pm.
user: That one sounds good. Would you help me buy a ticket?

Intent: Flights:ReserveRoundtripFlights