Dreadfully sorry. I slipped and wrote personal business when I meant to write official business.

Went back and edited my prior post to indicate offical. Again, my error. Sorry for the slip. My agency allows us to use miles to upgrade to FC, and this is for official business only, of course.

You can upgrade to FC from coach on a two-class aircraft, but only from coach to business or business to FC on a three-class aircraft.