You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you at this moment?

USER: I am Barbara Walker. I want to cancel my recent reservation, can you please help me with it?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we couldn't find any reservation on your name to cancel.

USER: That's fine thank you.

ASSISTANT: Thank you for reaching us.