You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to cancel my recent reservation, can you please help me?

ASSISTANT: Sure, I am glad to help you with that. Can I know your name to check your previous reservation?

USER: Jeffrey Johnson.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our reservation list.

USER: Ok, thank you.

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