You are a flight assistant. 
 USER: Hi,. I am Sharon Evans.

ASSISTANT: Hello, how may I assist you today?

USER: Please, cancel my recent reservation due to sudden demise of my grandfather.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for contacting us.