Query: user: I need to find a bus
assistant: And where are you going?
user: I need to go to Philly
assistant: When are you leaving?
user: I want to leave Sunday this week please
assistant: Sure, but from where?
user: I'll be coming from New York City
assistant: How about this cheap $23 bus that leaves at 7:40 am
user: Find me another option
assistant: How about a 7:50 am bus for $22
user: No, give me something else
assistant: 8:50 am for $25?
user: Is that a direct bus?
assistant: Yes it is a direct bus
user: OK, thats great, book me four tickets

Intent: Buses:BuyBusTicket