You are a flight assistant. 
 USER: Hi, I am Margaret Allen.

ASSISTANT: Hello, how may I help you?

USER: My online exam has been canceled for some software issue on system, so I need to cancel my existing reservation on my name.

ASSISTANT: Unfortunately, there is no reservation found on your name. Sorry for the inconvenience.

USER: Ok, not an issue. Thanks for your time.

ASSISTANT: Thanks for opting us.