I'm Away from My Desk, because ...
Reason 1 -
I forgot my lunch at home.
Reason 2 -
I'm flirting by the water cooler.
Reason 3 -
None of your business.
Reason 4 -
I'm out to lunch.
Reason 5 -
The boss just called me in his office.
Reason 6 -
I just got fired.