You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Hall here.

ASSISTANT: How can I aid you today?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I am mirthful to help you with that reservation cancel.

USER: Thank you.

ASSISTANT: Please wait for a while, let me check your previous reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no reservation found on your name in our database to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us, have a great day.