Companion Care Needed

We are looking for a companion to keep my mother in law company during the day. She has dementia, but is still very talkative, mobile, etc. we would love someone to do puzzles, go on walks, have lunch, etc with her. Just keep her fed, mind active, and moving. We are completely flexible on days/times but would like to create a schedule in advance so her husband can plan time to himself. Hours could be anywhere from 2-8 hours per day.