Hello, Michael Nelson is my name.
Hello, how shall I assist you?
Due to health issue I would like to request for cancellation, Can you please help me in doing this?
Sure, I will help you in cancelling a flight ticket. Please wait for a while, I will check your reservation and get back to you.
Ok.
 Thank you for waiting, there is no reservation found on your name to cancel.
Ok, Thanks for your information.
Thank you for contacting us, have a good day.