You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jonathan Miller, I want to cancel my reservation due to sudden health issue. Can I you help me to cancel my reservation?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.