You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Patrick Jones, I want to meet my a orphan home as I need to collect some information for my social welfare work.

ASSISTANT: Ok.

USER: Help me in booking my flight ticket from NY-JFK to TX-DFW.

ASSISTANT: Sure, please share your trip dates.

USER: I want to start my journey on 02/19, my return to New York is on 02/21.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.