You are a flight assistant. 
 USER: Hi, I am Donald Anderson.

ASSISTANT: Hello, how can I support you today?

USER: Due to the sudden death of the company chairman, my appointment has been cancelled. Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patient, There is no reservation found on your specified name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.