You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help  today?

USER: I want to book a flight ticket from ATL to CLT. Could you help me in booking?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My planned travelling dates are from Mar 31 - Apr 02.

ASSISTANT: Ok, do you have any other requirements?

USER: I prefer for direct flight.

ASSISTANT: Do you  have any other specifications?

USER: No.

ASSISTANT: Can I have your good name please?

USER: Charles Parker.

ASSISTANT: Sorry to inform  you that no flight is available to you on your  planned dates.

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

ASSISTANT: Thank  you for choosing us, have a good day.