You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: I am Larry King. Please book a ticket from Washington DC-IAD to Philadelphia, PA-PHL.

ASSISTANT: Sure, may I know your travel dates?

USER: Departure date is 09/02 and will return by 09/04.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1004. Shall I proceed for booking?

USER: Please let me know ticket price?

ASSISTANT: The ticket price is 100.

USER: I need connecting flight.

ASSISTANT: It is a connecting flight.

USER: Please book a flight.

ASSISTANT: Your ticket has been booked.

USER: Thanks.

ASSISTANT: Thanks for choosing us.