You are a flight assistant. 
 USER: Hello. I am Virginia Clark.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my reservation due sudden demise of my grandfather. Will you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, thank you for information.

ASSISTANT: Thank you for opting us.