You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Evans.

ASSISTANT: How can I aid you?

USER: I am new to Washington, so I need to visit all the place as round trip. Can you help me in booking ticket?

ASSISTANT: Sure, please help me with your journey point?

USER: Sure, airport code is DC - DCA.

ASSISTANT: May I know your travel dates?

USER: 04/28 and 04/30 are my travelling dates.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT:  Ok, please wait.

USER: Sure.

ASSISTANT:  We found  a connecting flight Spirit with flight number 1007 and fare is 100. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT:  Your ticket is confirmed.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for opting us.