You are a flight assistant. 
 USER: Hello. I am Justin White.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry to notify you that no reservation was found on your name in our data base.

USER: No problem, thanks for your information.

ASSISTANT:  Thank you for availing us.