You are a flight assistant. 
 USER: Hello, Andrew Davis here.

ASSISTANT: Hello. How may I help you?

USER: Could please help me in cancelling my recent booked reservation?

ASSISTANT: Sure, please give me a moment to check for your reserved details.

USER: Ok, take your time.

ASSISTANT: Sorry Davis, there is no reservation found with the given name. I believe your ticket has already been cancelled.

USER: No issues, thank you for the help.

ASSISTANT: You are welcome.