You are a flight assistant. 
 USER: Hello, I am Gregory Rodriguez.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my recent reservation, as my exam got cancelled. Please help me in cancelling?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there was no reservation found on your name.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for choosing us.