Query: user: I'd like to find flights.
assistant: When would you like to fly? What is your destination and where would you like to depart from?
user: I'd like to travel from Portland to Seattle on March 13th.
assistant: I have found American Airlines Flight with 0 stops that departs at 9:15 pm. The ticket costs $59.
user: Thanks but I'd like to find alternative flights for the 12th of this month. There will be two people travelling.
assistant: There are 2 flights that meet your criteria. How about a Delta Airlines flight with 0 stops leaving at 9:35 am. The ticket price is $76.
user: When does the outbound flight arrive.
assistant: The flight arrives at 10:33 am.
user: That sounds perfect. Can you go ahead and purchase an economy ticket.
assistant: Okay so you'd like 2 economy tickets on a Delta Airlines flight from Portland to Seattle leaving in March 12th.
user: Yes that's correct. Which airport does the flight leave from?

Intent: Flights:ReserveOnewayFlight