You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking a flight ticket from JFK to ATL?

ASSISTANT: Sure, may I know your name?

USER: Myself Dorothy Hill.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are from Aug 12 to Aug 14.

ASSISTANT: Do you need any other specification?

USER: No.

ASSISTANT: Sorry, there are no flights available.

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

ASSISTANT: Thank you for choosing us.