Query: user: I need to find a train.
assistant: Where are you travelling from?
user: I will be leaving from San Fran.
assistant: When will you be travelling?
user: Ideally I'd like to travel this Sunday if possible.
assistant: Where would you like to travel to?
user: I'm going to LA
assistant: I have found a train that departs at 6:20 am. What do you think? Tickets cost $83.
user: Which station does it leave from?
assistant: It leaves from the Salesforce Transit Center.
user: Please can you tell me the name of the destination station?
assistant: Sure, no problem. The train arrives at Union Station.
user: I like the sound of this option. Please can you go ahead and book me a ticket. I don't know if I'll definitely be travelling on that date so conditionally refundable tickets would be best.
assistant: How many tickets would you like to purchase?
user: Just one thanks.

Intent: Trains:GetTrainTickets