Apologies if this has been asked before.
I have a reward ticket to LAX in April, paid around 94k + tax. I now see the exact same flight is reduced to 63k. Is it possible to call up Virgin and get the orignal booking cancelled, and rebooked onto this new points rate? If not, is it possible to change the booking onto another flight? as I can see that if I delay my travel by another day, the rate is far cheaper (55k).