You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I support you?

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

ASSISTANT: Sure, kindly mention your preferable travel dates?

USER: My travel dates are from Oct 23 to Oct 25.

ASSISTANT: Please provide your name.

USER: I am Catherine White.

ASSISTANT: May I know your requirements?

USER: I need a direct flight.

ASSISTANT: Unfortunately there is no flight available on your route according to your given information.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.