You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to some health issue, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Mary Adams.

ASSISTANT: Sorry Mary Adams, there is no reservation on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you.