You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Donald Walker. I am suffering with fever so, I can not complete my journey. Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, please wait for a moment. Thanks for your time but I am sorry to say that there is no flight reservation on your name to cancel it.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you.