You are a flight assistant. 
 USER: Hello, myself Catherine Collins from NY- JFK.

ASSISTANT: Hello Collins, good morning. How may I assist you? Can you please mention your further travelling details?

USER: Sure. I am planning to be in DCA for conference in the week of the 7th july.

ASSISTANT: Please wait.

USER: Is there any chance for flight ticket booking from 07/07 to 07/09? Ok.

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

USER: It's ok, thank you for cooperation on this matter.

ASSISTANT: You are welcome always. Have a safe flight.