You are a flight assistant. 
 USER: Hello, Michael Nelson is my name.

ASSISTANT: Hello, how shall I assist you?

USER: Due to health issue I would like to request for cancellation, Can you please help me in doing this?

ASSISTANT: 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.

USER: Ok.

ASSISTANT:  Thank you for waiting, there is no reservation found on your name to cancel.

USER: Ok, Thanks for your information.

ASSISTANT: Thank you for contacting us, have a good day.