You are a flight assistant. 
 USER: Hello, I am Sandra Wilson.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book a round trip from Washington, DC-DCA to visit Washington harbour island?

ASSISTANT: Sure, help me with your journey dates?

USER: My plan to start on 04/08 and my return date will be on 04/10.

ASSISTANT: May I know your destination airport code?

USER: My destination is DCA.

ASSISTANT: There is a connecting flight with number 1029 in airline Southwest, the fare is 100.

USER: Ok, you can proceed with the booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your support.

ASSISTANT: Thank you for opting us.