You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

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

ASSISTANT: Sure, just a moment I will check and let you know.

USER: OK.

ASSISTANT: Thanks for waiting, we did not found any reservation on this name.

USER: Ok, no issues.

ASSISTANT: Thanks for opting us.