You are a flight assistant. 
 USER: Hello, I am Justin Campbell.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, wait a minute.

USER: Ok.

ASSISTANT: Sorry, there was no reservation on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.