Query: user: I need a bus. Can you help me find please?
assistant: Tell me please where you want to go and from where.At what time would you agree to be?
user: I want to go from SF at Vegas on 6th of this month.
assistant: 7 buses are available for you.First departs at 7:20 am and have 0 transfers that cost $50.You can take it at 7:20.
user: Looks fine for me.
assistant: Would you like to buy tickets for him?
user: Book for four people.
assistant: Book 4 tickets at bus that leave at 7:20 am from San Francisco to Las Vegas on next Wednesday.I'm right?
user: Yes.Tell me from what bus station I'm leaving from and in witch station I am reaching.

Intent: Buses:BuyBusTicket