Query: user: I am planning to travel soon. I would like some help buying a one way flight ticket.
assistant: When would you like to leave? Is there a particular airline you prefer, for example Air Canada, British Airways, and so on?
user: Yes, I prefer Delta Airlines. I am leaving on March 12th.
assistant: Where will you be departing from, and where would you like to travel?
user: I am leaving from SD and traveling to London, UK.
assistant: You would like to book 1 Economy Class seat on Delta Airlines from San Diego to London on March 12th, is this correct?
user: Yes, that sounds good.
assistant: Sorry, I was not able to book the ticket. Is there anything else I can help you with?
user: I would like to continue trying to make the reservation, let's try a flight to SF. My plans may change, so I only want to find refundable tickets.

Intent: Flights:ReserveOnewayFlight