You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am looking to book a flight ticket from AUS to ATL. Can you help me for that?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Sep 20 and Sep 22.

ASSISTANT: May I know your connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any specifications?

USER: My depart time is afternoon.

ASSISTANT: May I know your name?

USER: My name is George Lee.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry George Lee, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.