You are a flight assistant. 
 USER: Hello. I am Donald Hill.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name. Thank you for reaching us.

USER: Ok, no issues. Thank you.