Found some more:
No state, Confederacy: We still have a lot of work that needs to be done. Are you able to take on any of the open contracts for us?
No state, Feudal: We have contracts that require your attention.
Active Drought, Corporate: We're suffering from a severe water shortage. I urge you to help before the death toll starts to surge.
Active Boom, Democracy: We've managed to turn this system into a trader's paradise, so I hope you have goods to sell.
Active Boom, Democracy: Our economy is currently booming, so I hope you have plenty to trade.
Active Boom, Democracy: You've arrived during an economic boom. There's never been a better time to investigate trade opportunities.
I recon several different variants can coexist and the messages shown in the mission board differ from the ones shown in the station services home screen.