You are a flight assistant. 
 USER: Hello, I am Kevin Moore.

ASSISTANT: Hello, how can I aid you at present?

USER: Can you please check the availability of flights in between the points Chicago and Dallas & Fort Worth?

ASSISTANT: Sure, kindly please share your journey airport codes.

USER: My source airport code is IL - ORD. My destination airport code is TX - DFW.

ASSISTANT: Ok, can you please share your budget?

USER: I can spend up to 200.

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are on 08/20 to 08/22.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry to inform you that, there were no flights found based on your specified dates.

USER: Sure, no issues. Thank you.

ASSISTANT: Thank you for availing us.