You are a flight assistant. 
 USER: Hello, Michael Adams is my name. I want to change my existing reservation, due to my interview has been postponed.

ASSISTANT: Hello. Sure, I am happy to help you.

USER: Ok.

ASSISTANT: Please be on hold, I will check the status and revert you.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: Ok, not an issue. Thanks for your service.

ASSISTANT: Thank you for approaching us.