You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Gregory Rodriguez. I made a earlier reservation to attend a seminar, due to some problems it got cancelled. Can you please cancel my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us.