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

ASSISTANT: hello, how can I assist you?

USER: I want to cancel my reservation due to sudden demise of my uncle.

ASSISTANT: Ok, I will help you. Please stand by.

USER: Sure.

ASSISTANT: Thanks for waiting,. Sorry to say that, there is no reservation found in your given name.

USER: Ok, thanks for informing.

ASSISTANT: Thank you for choosing us.