You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation which I have done previously to attend a business meeting.

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Margaret Miller.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry Miller, there is no reservation found on your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for approaching us.