You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking a flight ticket from AUS to PHL?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my travel dates are from Aug 20 to Aug 22.

ASSISTANT: Do you have any connection limit?

USER: I would prefer connecting flight for my trip.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Anna Robinson.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.