Query: user: I need train tickets. I'll be riding from Anaheim, CA on the 13th of the month.
assistant: Can you provide me the arrival city?
user: Oh right. I'll be traveling to Sacramento, CA.
assistant: I have found tickets for you. There is a train departing to Sacramento, CA at 6:50 am. The tickets will cost $132.
user: Perfect. Go ahead and book those train tickets for me.

Intent: Trains:GetTrainTickets