Hopefully you would be contacted.

Given that MH796 was the last flight of the day and MH148 arrives after the previous service, I cannot see what MH would be able to do for you for travel that day

If the next morning's service to BKK has availabity that may be the best option for an award ticket from MH

Depending on the day of week there is a RJ flight at 22:10 which , if it has award availability, may be a good option. Alternatively , perhaps check for other routings such as AKL-KUL or AKL-HKG for award availability