You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I need my reservation to get cancelled. My name is Ronald Lewis.

ASSISTANT: Sure, please wait for while, I will check and back to you.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thanks for the assistance.

ASSISTANT: Thank you for opting with us.