Hi Crispin,
I've showed you the dialog 2 times. Can't u See it Properly. Open your eyes wide and see it man. Or Just Open any of the Product of Office 2k and See the Assistant Interacting with you. If you didn't save a opened document It would just ask you the Question which I've pasted as a picture above in my Post. If u still can't get it... I don't know how to explain you...