You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you today?

USER: I am Alexander Nelson. I would like to cancel my reservation, due to an private work, help me in cancelling my reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel.

USER: No problem, thank you for your assistance.

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