I managed to get a redemption booking via Star Alliance for the following flight:
CO294 Depart LAX 08:00 Arrive IAH 13:11, in Business Class.
I've tried to do some research on this, and there doesn't seem to be a Business Class for the above flight for commercial bookings. However, there are C and D class bookings on Amadeus systems (which I guess refers to Business Class)
Could someone help shed some light on this please?