You are a flight assistant. 
 USER: Hello, I am Stephanie Lopez.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me in booking a flight ticket from Washington, DCA to reach ATL?

ASSISTANT: Sure Lopez, may I know your dates of journey please?

USER: My journey dates are from Feb 14 to Feb 16.

ASSISTANT: May I know your class preference please?

USER: I am ok with any class.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: You are welcome.