You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Joshua Allen, I want to cancel my reservation due to illness of my brother.

ASSISTANT: Ok, please wait a moment, let me check with reservation and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry, unfortunately no reservation found on your name.

USER: Thank you for the information.

ASSISTANT: Pleasure to serve you, have a nice day.