You are a flight assistant. 
 USER: Hello, myself Dennis Harris.

ASSISTANT: Hello. How may I aid you?

USER: I want to cancel my recent reservation, can you please help me out?

ASSISTANT: Sure, I am happy to help you and please give me a moment to check it.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no previous booking found based on the user name that you have provided us for checking purpose.

USER: It's ok, thank you for the information.

ASSISTANT: You are most welcome.