Query: user: Help me search for one-way flights, please.
assistant: Can you provide me with details of your itinerary?
user: I want to fly on 9th of this month, travelling from Portland, OR, to Vancouver, BC.
assistant: Well, you have 3 options. I recommend an American Airlines flight departing at 10:45 am, with 1 scheduled stop, at a cost of $226.
user: I'd prefer to look at something else.
assistant: In that case, there is a Southwest Airlines flight leaving at 3:15 pm, with 1 scheduled stop, at a cost of $217.
user: Keep searching please. I need just the one ticket.
assistant: The 1 remaining option is a United Airlines flight leaving at 10:35 am, with 1 scheduled stop, at a cost of $228.
user: When does it arrive in Vancouver? Is the ticket refundable?
assistant: The flight will arrive at 8:12 pm, but the ticket is not refundable.
user: Well, I like the sound of it.
assistant: Shall I buy the tickets now?
user: Yes, go ahead.
assistant: So to recap, you want me to book 1 economy ticket for a United Airlines flight from Portland to Vancouver, departing on March 9th?
user: That's all in order.
assistant: The ticket has been purchased.
user: Which airports are on this route?

Intent: Flights:ReserveOnewayFlight