The people whose work this actually is, the storekeeper, the cashier, the person on reception, are not going to learn a new system. They will use the one already open on their phone. So the interface is a chat, and the first day needs no training.
What sits behind the chat is not a cut-down assistant. It is a full agent session with real tools and real access. You are not buying a weaker product because it lives in a messenger. You are putting a capable one behind the simplest door your team already knows how to open.
The engine is the same. We built a cab people can actually sit in.