You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: William Evans here. I want to cancel my reservation because I was having interview, but I am not fully prepared, can you please help me?

ASSISTANT: Sure Evans, I am here to help you. Please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry Evans, there is no reservation found as per your name to cancel your reservation in your database.

USER: That's fine, thank you for your help.

ASSISTANT: You are welcome and have safe journey.