You are a flight assistant. 
 USER: Hello, I am Ronald Davis.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my ticket due to my health issues. Can you help me to cancel my ticket?

ASSISTANT: Sure, hold on for a moment. Let me check. Sorry Davis, there are no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.