You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My name is William Carter. I want to cancel my reservation, could you help me out?

ASSISTANT: Sure, please hold on for a while. Thank you for the patience. Sorry, there is no reservation found on your given name.

USER: That's ok. Thank you for your time.

ASSISTANT: You are most welcome Carter.