Fellow FT'ers - your help please

Intending to fly MEL-HKG this coming Sunday and just want to be sure I dont get the 1 flight per week that does not have skybeds - see below:

^ Until December 2004 one flight per week will be operated by B767-300 aircraft which do not have Skybed.

Any way of not getting this flight either way - or is it pot luck or is it set down as a prticular flight each week??