Query: user: I need to buy bus tickets.
assistant: How many tickets do you need?
user: I need 4.
assistant: What is your departure city and time?
user: I want to leave Fresno, CA at 1:30 pm.
assistant: What is your destination?
user: My destination is SF.
assistant: And your departure date?
user: I'm leaving this Sunday.

Intent: Buses:BuyBusTicket