You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Myself John Green from Atlanta. Can you please book a direct flight ticket to Charlotte?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you for your positive response, I want to take off on 02/09 and please confirm my return ticket also on 02/11.

ASSISTANT: Can I know your airport codes too?

USER: I want to take off from ATL and destination airport is CLT.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.