Hi at all

I just booked a very cheap trip from AMS to HNL.

AMS – LHR (booking class S) Flight with AA (operated by BA)
LHR – LAX (booking class O) Flight with AA (operated by BA)
LAX – HNL (booking class O) AA Flight
HNL – LAX (booking class O) AA Flight
LAX – LHR (booking class O) AA Flight
LHR – AMS (booking class S) Flight with AA (operated by BA)

Do you think that there is any possibility/chance that I could upgrade LHR-LAX and LAX-LHR?

Many thanks