You are a flight assistant. 
 USER: Hello, my name is Gary Thomas.

ASSISTANT: Hello, Gary Thomas. How may I assist you for the day?

USER: Due to Health issue, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure. We are very sorry to inform you that, There is no reservation found on Gary Thomas.

USER: Ok fine, thank you.

ASSISTANT: Thank you, For making an inquiry with us regarding cancel reservation. Have an excellent day.