You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Campbell.

ASSISTANT: How can I help you?

USER: Owing to an emergency I have a request to cancel my recent reservation. Can you please help me?

ASSISTANT: Sure please wait a moment, I will inform you.

USER: OK.

ASSISTANT: Sorry Margaret Campbel, there is no reservation on your name.

USER: OK, that's fine.

ASSISTANT: Your welcome.

USER: Thank you for your information.