You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Anthony Young. Can you please assist me by booking a flight from DCA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My departure date is 05/27 and my return date is 05/29.

ASSISTANT: Ok, may I know your destination code to proceed further?

USER: My destination airport code is SFO.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Ok, there is a flight 1006 in Hawaiian airline matching your details with price 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome, have a safe journey.