Query: user: Could you find me one seat on a train?
assistant: Where are you going to and leaving from and on what date would you like to travel?
user: I'd like 2 seats from Portland going to Vancouver, BC on the 6th of March.
assistant: There are 7 trains that would potentially work. How does a train leaving at 7:40 am that costs $139 sound?
user: Where is it leaving from and where will it arrive at?
assistant: It's leaving from Union Station and will arrive at Pacific Central Station.
user: Are there other options going to Seattle?
assistant: There are 9 trains that might work. How about one leaving at 9:10 am that costs $105?
user: That would be great.

Intent: Trains:FindTrains