Query: user: I need a round trip flight.
assistant: Where would you like to go and when?
user: I will be heading to Ciudad de mexico from los angeles.
assistant: When would you like to leave and when would you be returning?
user: There are four of us and we would be traveling on March 4th and returning on the 13th of March.
assistant: There is an outbound flight on American airlines that leaves at 2:45 pm. It would be returning at 8:05 am and costs $156
user: That would be just fine.
assistant: Would you like me to purchase the tickets?
user: Yes, please do.

Intent: Flights:ReserveRoundtripFlights