You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have reserved a ticket with your service last month, to participate in a Technical symposium but suddenly that event got cancelled. Can you please help me to cancel my recent reservation?

ASSISTANT: Yes, I can help you in that. Can I know your name for cancelling purpose?

USER: Sure, I am James Lee.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Most welcome.