You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation due to cancel of my live concert event at Denver.

ASSISTANT: Sure, can I know your name please?

USER: Would it be possible to cancel my recent reservation? I am Sarah Nelson.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: No worries, thank you for the information.

ASSISTANT: Thank you for approaching us.