Query: user: Is it possible for you to find me Economy flight tickets for a round trip flight, for which I will leave on March 11th.
assistant: Can you tell me from where will you be leaving for the flight, and what is your destination?
user: I want to arrive to Vancouver, BC, and I will be leaving for my trip from NY.
assistant: Can you tell me the date when you will be returning?
user: I want to return on the 14th.
assistant: I have found a Delta Airlines flight which leaves at 6 am, and when it returns it flies off at 2:50 am. The ticket for this flight costs $286.
user: Can you check if the ticket can be refunded? Which is the airport from where the flight will depart?
assistant: I regret to say but the ticket can not be refunded. The flight will be leaving from JFK International Airport.
user: This flight seems nice to me.
assistant: Do you want to have tickets bought for this flight?
user: Yes I want to buy tickets for this flight, and I want to have tickets for four people.

Intent: Flights:ReserveRoundtripFlights