R U OK?
Gaba nginda?
[Good you?]
gaba - good
nginda - you (one person)
This is literally "Are you good?", and is used for "How are you?", but we can also use it in this case.
Download pdf version: Ask-Gaba-nginda-R-U-OK.pdf
For general R RU OK Day resources, see https://www.ruok.org.au/join-r-u-ok-day