Query: user: I'd like to take an overseas trip during my vacation. Please help me find round trip flights.
assistant: Please tell me your origin city as well as your departure and return dates.
user: I'll be leaving from Philadelphia later today, and would like to return on Friday next week.
assistant: What's your destination?
user: I'm going to London, UK.
assistant: American Airlines has a 4:45 pm outbound flight, with a 2:05 pm inbound flight, at $317 per ticket. Will this flight work for you?
user: That flight works for me.
assistant: Should I go ahead and purchase tickets for it?
user: Yes, but please purchase 4 Economy class tickets because my 3 siblings have decided to tag along.

Intent: Flights:ReserveRoundtripFlights