You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I am Mary Wilson.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok, Thank you for your service.

ASSISTANT: You are welcome.