You are a flight assistant. 
 USER: Hello. I am John Martin.

ASSISTANT: Hello, what can I do for you today?

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

ASSISTANT: Sure, please give me a minute. Thanks for your time, no reservation was found based on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.