You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Sharon Anderson, want to cancel my recent reservation due to some personal problem. Please help me out with that.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome.