Hi there,
Which flight are you booked on CX888 or CX 838?
If on the CX888 your chance is less as there are only 8 F class seats in total.
I think one of your travelling companion can be confirmed on the day of travel but I think 2 is streching it a bit much.
Are you MPO gold or Diamond?
My travel Companion got confirmed on the day of departure in Z Class and I got confirmed 3 weeks before departure. I was told pretty much it is mostly fully book most of the time.
Also given it is around Chinese NY it might be a bit hard.