You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am looking for a flight from AUS to CLT, can you help me in booking.

ASSISTANT: Sure, please send your travelling dates.

USER: Sure, my planned travel dates are Mar 19 and Mar 21.

ASSISTANT: Do you have any class or time preferences?

USER: Yes, I would like to return my journey for the evening flight in an economy class.

ASSISTANT: May I know your name?

USER: Myself Shirley Adams.

ASSISTANT: Is there any connection preference.

USER: Please look for a direct flight.

ASSISTANT: Sorry, there is no flight available with your requirements.

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

ASSISTANT: You are welcome, have a nice day.