Query: user: I am looking for round trip flights just for one person.
assistant: Where are you interested in going and when?
user: I want to go next Monday to Chicago.
assistant: What will be your return date?
user: I need a return fight for the 12th.
assistant: What city will you be leaving from?
user: I am leaving from SF.
assistant: I found 4 options for you to conside. There is an outbound flight at 3:20 pm with American Airlines with the return fligh leaving at 12:30 pm. The total cost is $270.
user: Are there any other options?
assistant: There is a Delta Airlines flight leaving at 10:05 pm and returning at 10:40 am costing $194.
user: Anything else available?
assistant: Yes there is a Southwest Airlines flight leaving at 5:50 pm and returning at 4:35 am. Tht total cost is $194.
user: That one sounds perfect.
assistant: Would you like me to purchase the tickets?
user: Yes please travelling Economy.

Intent: Flights:ReserveRoundtripFlights