Query: user: I need to travel soon. Search a round trip flight from American Airlines?
assistant: Where do you plan to depart and return?
user: Search for flights from tomorrow until the 10th of this month.
assistant: Where will you go? And from where will you depart?
user: Look for something from San Fran to London.
assistant: There is an American Airlines flight available. The departing flight takes off at 7:05 am and the returning flight takes off at 3:05 pm. It has a total cost of $406.
user: That sounds great. I want to book a ticket.
assistant: Please confirm: Booking 1 Economy class ticket for American Airlines. Flight departs from San Francisco on March 2nd at 7:05 am with destination London. Returning flight takes off at 3:05 pm on March 10th.
user: Yes, that is correct. Is it a refundable ticket? From which airport does it departs?

Intent: Flights:ReserveRoundtripFlights