Query: user: I need to find a one-way flight.
assistant: What is your departure date and city and what is your destination?
user: Leaving today from Portland and heading to Seattle, WA.
assistant: There are 4 options. One is on American Airlines departing at 9:15 pm with 0 stops for $64 per seat.
user: Is it refundable and what is the airport it departs from?
assistant: The departing airport is PDX International Airport. The flight is in fact refundable.
user: Do you have any options on a different airline?
assistant: There are 3 options. There is a Delta Airlines flight departing at 9:35 am with 0 stops for $62 per seat.
user: Can you book a one-way ticket on that one please?
assistant: Please confirm you want me to book 1 economy seat on Delta Airlines flight departing from Portland and arriving at Seattle on March 1st.
user: Yes. From which airport will I depart?
assistant: The flight departs from PDX International Airport. Your flight has been confirmed.
user: At what time does the return flight arrive and is it a refundable ticket?

Intent: Flights:ReserveOnewayFlight