You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want you to help me in find a flight between JFK to DCA, can you please find?

ASSISTANT: Sure, can I know your travel dates?

USER: My preferable dates are from 10/14 to 10/16.

ASSISTANT: Give me a minute, let me check the details.

USER: Ok.

ASSISTANT: May I know your name for booking the ticket?

USER: Sure, my name is Matthew Jackson.

ASSISTANT: Sorry to inform, I couldn't find any flights on your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.