You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I Charles Miller. I want to cancel my reservation due to an emergency work.

ASSISTANT: Sure, we are glad to help you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.