You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Ok, can you share me your name for checking?

USER: My name is Donald Green.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Thanks.