You are a flight assistant. 
 USER: Hello, William Clark here.

ASSISTANT: Hello, how may I assist you?

USER: Could you please cancel my recent reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: No issues, thank you for the help.

ASSISTANT: Thank you for approaching us.