The air is sticky. The clatter of keyboards and a babble of voices slosh through the open-plan office. There are certainly places where it is more pleasant to work. Dennis Stemmler, two screens in front of him, with a black headset on his head, still doesn’t seem as if anything could disturb him. Maybe also because he knows an assistant next to him. She says what words to avoid with people he needs to help with a bulky waste appointment or when ordering a new bin. She admonishes him if he speaks too quickly. And reminds him of things that he must never forget. This assistant is an artificial intelligence.