Query: user: I'm looking for one train ticket traveling from Vancouver, BC to Portland.
assistant: What date are you traveling on?
user: I'm departing on March 4th.
assistant: I found 8 trains that may work. There is one departing at 6:50 am for $76.
user: Okay, that sounds good.
assistant: Would you like to purchase a ticket?
user: Yes, I would like to purchase conditionally refundable tickets.

Intent: Trains:GetTrainTickets