You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Green.

ASSISTANT: How can I help you today?

USER: I want to cancel your recent reservation, due to some health issue. Can you please help me?

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: Not an issue, anyway thank you for checking.

ASSISTANT: Welcome, have a nice day.