You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Rebecca Perez. I am planning to attend music concert at Charlotte, can you please help me with booking a flight ticket?

ASSISTANT: Can you please tell your travelling dates?

USER: Sure, I would like to take off on 04/02 and return back on 04/04.

ASSISTANT: May I know your travelling locations?

USER: My source airport code is AUS and the destination airport code is CLT.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you and have a nice day.

USER: You are welcome.