You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Anthony Martin, I want to cancel my reservation.

ASSISTANT: Sure, I am happy to help you in ticket cancellation.

USER: Ok, sure.

ASSISTANT: I am sorry that there is no ticket that has found on the name which you have provided to cancel it.

USER: It's ok, thank you for the information.

ASSISTANT: Most welcome.