Friendly visitor needed for a 92-year-old neighbor in Berlin

I'm writing for my neighbor Greta, who's 92. Greta lives alone in Berlin, and lost a spouse of many years last year. The nearest family lives 627 kilometers away. Greta loves baking, and would enjoy someone to chat with. An hour a week, perhaps on Sunday afternoon, would mean the world. We can also arrange a phone call if you can't visit in person. All visitors will be introduced by me and I'll be there at the first meeting. I'll share references and, if you'd like, a short orientation from the local befriending charity. No special skills are needed - just kindness and patience. Whatever you can give, even just sharing this page, means a lot.