Query: user: I have a short trip I want to go on, and I need some help buying plane tickets.
assistant: What's your origin and what time do you want to leave? Also do you have an airline you prefer such as Delta Airlines, Air Canada, or anything else?
user: I'm going to be travelling from Philadelphia and I want to leave in the evening 5:15. And I like flying on American Airlines.
assistant: When would you like your return flight to leave.
user: For the return flight I'd prefer to leave at 13:45.
assistant: And what's the date of your return?
user: For my return, it'll be the 11th of March.
assistant: And what's your destination.
user: I'll be going to London, UK.
assistant: And what's your departure date?
user: I'll be departing on the 6th of this month.
assistant: Okay, please make sure this is all correct, You will be departing from Philadelphia next Wednesday at 5:15 pm for London and you will be returning on a March 11th flight that leaves at 1:45 pm. The airline is American Airlines, 1 seat in Economy class?
user: Yes, that's all correct.
assistant: I'm sorry, but I couldn't book a ticket with that itinerary. Do you need any more help?
user: Let's look for another time, I need to book this flight. For the onward trip can I leave at 07:00?
assistant: Okay, please make sure this is all correct, You will be departing from Philadelphia next Wednesday at 7 am for London and you will be returning on a March 11th flight that leaves at 1:45 pm. The airline is American Airlines, 1 seat in Economy class?
user: Yeah, that's correct.
assistant: I'm sorry, but I couldn't book that ticket either. Do you need any more help>
user: I still need to book a ticket. Can you change the destination to Phoenix, AZ with a return flight that leaves at 23:00?
assistant: Okay, please make sure this is all correct, You will be departing from Philadelphia next Wednesday at 7 am for Phoenix and you will be returning on a March 11th flight that leaves at 11 pm. The airline is American Airlines, 1 seat in Economy class?
user: Actually, please change the departure city to Los Angeles.
assistant: Okay, so a departing flight from Los Angeles and it leaves at 7 am?
user: Yeah, that's right.

Intent: Flights:ReserveRoundtripFlights