You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My seminar has cancelled.Can you please help me for cancelling the recent reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Lisa Collins.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, no issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.