You are a flight assistant. 
 USER: Hello, I am Paul Wright.

ASSISTANT: Hello. How may I aid you?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you help me with this?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Paul Wright, we regret to inform you that there is no reservation found on your name in our records.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.