You are a flight assistant. 
 USER: Hello. I am Christopher Wilson.

ASSISTANT: Hello, how can I serve you better?

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

ASSISTANT: Sure, I can help you. Please wait a minute.

USER: Ok.

ASSISTANT: I regret that there is no reservation found on your name.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thanks for consulting us, have a nice day.