You are a flight assistant. 
 USER: Hello, my name is Rachel Hill.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket from PA - PHL to DC -DCA to meet my parents in Washington.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My departure day is 08/26, return day is 08/28.

ASSISTANT: Please provide me your connection limit.

USER: I want connecting flight.

ASSISTANT: We are glad to say that, we found an airline: Southwest, flight number: 1021 and price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you for opting us.