You are a flight assistant. 
 USER: Hello, I am Catherine Collins.

ASSISTANT: Hello,. How may I help you?

USER: My friend invited me to attend the Silver Jubilee Celebration of the The New York Times at New York, NY - JFK. Can you be my helping hand to book a flight?

ASSISTANT: Sure. Please specify your journey dates?

USER: I am willing to fly on 07/07. And I need to catch my return flight on 07/09.

ASSISTANT: Could you please provide origin airport code?

USER: My origin is from Dallas & Fort Worth, TX - DFW.

ASSISTANT: Please provide ticket price?

USER: I can afford 1000 for ticket fare from my budget.

ASSISTANT: No flight found for your requirement.

USER: Ok, I will search through another airline. Thanks for your excellent customer service.

ASSISTANT: Thanks. Have a nice day!.