Query: user: I want bus tickets for March 10th. I want flexible tickets. I'll be in Las Vegas.
assistant: Where is the destination? What time do you want to leave? How many tickets would you like?
user: I want the bus to leave at 3 o"clock in the afternoon. I want three tickets to go to SF.
assistant: 3 flexible bus tickets to go to San Francisco from Las Vegas on March 10th at 3 pm. Is this what you want?
user: Yes, that right.
assistant: I was not able to purchase the tickets. There is a bus leaving at 2:50 pm and costs $64.
user: That's fine then.
assistant: Your tickets have been booked.
user: What station would I be leaving from? What station does it arrive at?

Intent: Buses:BuyBusTicket