You are a flight assistant. 
 USER: Hello, I am William Mitchell.

ASSISTANT: Hello, how may I support you?

USER: I want to cancel my reservation, can you help me with it?

ASSISTANT: Sure, please wait for a minute.

USER: OK.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.