Query: user: Search for a train for me on the 4th.
assistant: What is your departure and arrival city?
user: I am travelling from San Fran to Anaheim.
assistant: There is a train leaving at 7:10 am and costs $91.
user: What is the departure station?
assistant: Salesforce Transit Center is the departing station.
user: That is perfect.
assistant: Shall I get you train tickets now?
user: Yes, book me some train tickets.

Intent: Trains:GetTrainTickets