You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Helen Nelson. I want to cancel my recent reservation because my brother marriage is cancelled.

ASSISTANT: Yes, I can help you. Sorry to inform you that there is no reservation found on your name.

USER: It's ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for contacting our agency.