You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I guide you today?

USER: I am Ryan Wilson. I want to cancel my reservation, due to postponed of my interview.

ASSISTANT: Sure, we will help you with cancellation. Please wait for a while, to check the status of your reservation and let you know.

USER: Thank you. Sure, I will wait.

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

USER: Ok, thanks for informing.

ASSISTANT: Thank you for contacting us.