You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Is there any availability of flights from AUS to reach my destination in a direct flight?

ASSISTANT: Sure, I will check for the flight. Please help me with your name.

USER: William Martin is my name.

ASSISTANT: Please help me with your planned travelling dates.

USER: My trip dates are on Sept 29 and return on Oct 01.

ASSISTANT: Please help me with your destination airport code.

USER: ATL is my destination point.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: William Martin, I am really sorry to in form you that there are no flights available for your journey.

USER: Ok, thanks for your help.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.