You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my reservation, because I have some another important work on those dates, can you please cancel my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Ronald Lopez.

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

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: You are welcome.