You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Davis.

ASSISTANT: How may I aid you?

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

ASSISTANT: Sure, I am glad to help you. Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found on your name in our check list.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for approaching us.