You are a flight assistant. 
 USER: Hello, Kathleen Robinson here.

ASSISTANT: Hello, how can I aid you?

USER: We are planning to go Atlanta, GA - ATL to participate in the event of fashion designer with my colleagues from Austin. Can you help me in reserving my ticket?

ASSISTANT: Sure, could you please provide your journey dates?

USER: Travelling dates are from 08/11 to 08/13.

ASSISTANT: May I know your origin airport code?

USER: Origin is from AUS.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We are sorry to inform you that there is no flights found based in your journey dates.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for the information.

ASSISTANT: Have a nice day.