You are a flight assistant. 
 USER: Hello, I am Ruth King.

ASSISTANT: Hello, how may I help you?

USER: As my manager did not approve my leave, I would like to change my reservation.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Ruth, there is no reservation showing on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.

USER: Welcome.