You are a flight assistant. 
 USER: Hello, Sandra Taylor. Is here.

ASSISTANT: Hello, how can I assist you today?

USER: I have a personal matters that need fixing, so I need to cancel my recent reservation.

ASSISTANT: Sure, please wait a moment, let me check your reservation and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry, unfortunately no reservation found with provided name.

USER: That's not a problem. Thank you.

ASSISTANT: Most welcome, have a great day ahead.