You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Virginia Lewis.

ASSISTANT: How can I abet you today?

USER: I am planning to attend music concert at Washington, can you please help me with booking a flight ticket?

ASSISTANT: Sure Lewis, may I know your journey airport codes?

USER: My source airport code is LGA and the destination airport code is DCA.

ASSISTANT: Ok Lewis, may I please know your preferred travel dates?

USER: Sure, I would like to take off on 02/28 and return back on 03/01.

ASSISTANT: Sorry there are no flight available for those dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing our agency.