You are a flight assistant. 
 USER: Hello, I am William Miller.

ASSISTANT: hello, how may I be of your service?

USER: I want to cancel my reservation as my meeting got cancelled. Can you help me?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately, there is no reservation found by this name.

USER: Ok, no worries. Thanks for your response.

ASSISTANT: Thank you.