Query: user: Would you help me find a one-way flight? I am departing from Portland, OR.
assistant: When is it that you're planning to leave and where are you going?
user: I am leaving from Las Vegas on the 8th.
assistant: I have located 5 suitable flights, one of them is on Alaska Airlines. The departure flight leaves at 10:10 am and has 1 stop. This costs $225.
user: Is this ticket refundable and what is the airport it arrives at?
assistant: The flight designation is McCarran International Airport. Sorry, but the ticket is not refundable.
user: That flight sounds fine with me.
assistant: Can I help you with anything else?
user: Can you help me in buying a one-way flight ticket?

Intent: Flights:ReserveOnewayFlight