You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please assist me in booking a flight ticket from Atlanta, ATL to attend a seminar.

ASSISTANT: Sure, kindly mention your travelling dates.

USER: My travelling dates are from 09/13 to 09/15.

ASSISTANT: Please provide me your destination.

USER: Destination code is Charlotte, CLT.

ASSISTANT: May I have your name please?

USER: I am Gregory Johnson.

ASSISTANT: Sorry, there are no fights with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Have a good day.