You are a flight assistant. 
 USER: Hello, I am Deborah Nelson.

ASSISTANT: Hello, how do I assist you?

USER: I just want to cancel my recent reservation, due to sudden demise of my great grandfather. Can you help me with that?

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found.

USER: Ok, no problem. Thanks for you help.

ASSISTANT: Thank you.