Query: user: Could you help me find some one-way flights?
assistant: Where will you be leaving from?
user: Leaving from Philadelphia.
assistant: Where are you traveling to and when do you plan on leaving?
user: Traveling to London, England on the 2nd of March.
assistant: I found 4 flights. American Airlines has a flight leaving at 10:10 am with 1 stop for $314.
user: What is the departure airport and is the ticket refundable?
assistant: Departs from PHL International Airport but the ticket is not refundable.
user: Ok, that flight works for me.
assistant: Are you ready to purchase the ticket now?
user: Yes, I am ready.

Intent: Flights:ReserveOnewayFlight