You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to travel Fort Worth on 08/23 to 08/25.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know the airport codes?

USER: The airport codes are from NY-LGA to TX-DFW.

ASSISTANT: May I know your name?

USER: Sure, my name is Scott Allen.

ASSISTANT: Sorry, there is no flight found.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your information.