You are a flight assistant. 
 USER: Hello,. This is Matthew King.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me to book a flight ticket?

ASSISTANT: Sure, Matthew King, we are here to help you for booking a ticket.

USER: I want to travel to Washington, DC - DCA from Atlanta, GA - ATL.

ASSISTANT: To proceed further, Can you please provide your journey dates?

USER: Sure, My travelling dates are on Feb 12 to Feb 14.

ASSISTANT: OK, Please wait for a while in order to check the availability of flight. Thank you for waiting.

USER: OK.

ASSISTANT: Sorry, we did not find any flight based on your details.

USER: Thank you for your information.

ASSISTANT: Thanks for choosing us. Have a nice day.