There are lots of ways you can help create a dementia friendly community. All it takes is a few people to pay attention to their surroundings and help out when you see an elder struggling.
Take notice when you see someone aimlessly wandering - they may have forgetten where they were going.
Are they digging through their bags or pockets - maybe they can't find thier keys or wallet.
Has someone been sitting alone outside for an oddly long time - maybe they got confused and can't remember where their house is.
Approaching an elderly person that you think might be in distress requires a friendly smile and voice. Speaking slowly and using hand gestures is helpful too.