You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you?

USER:  I want to change my recent reservation due to office work that my manager did not approved my leaves, so can you please change it?

ASSISTANT: Sure. I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name to check reservation?

USER: Ok, I am Steven Anderson.

ASSISTANT: Please, hold on.

USER: Sure.

ASSISTANT: Thank you for being patience.

USER: Ok.

ASSISTANT: I am here to inform you that,  there is no active reservation on your name to change it.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for approaching us.