You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Baker.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from DCA to CLT, can you help me in booking the flight ticket?

ASSISTANT: Sure, I am glad to help you in booking the flight ticket. May I know your planned travel dates?

USER: My travelling dates are from 11/12 till 11/14.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Baker, as per your intent there are no flights available.

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

ASSISTANT: Thank you for reaching us.