Who can tell me the service items and facilities of concierge in general five-star hotels?

The concierge of the hotel has many services. Let me tell you what I know. I want to help the guests carry their luggage, greet them at the elevator, see them off, open the door for them, deliver things, buy things, deliver newspapers and so on. I can also chat with guests and get information about them. Of course, different hotels may be different. The place where I work is like this (five-star), and the facilities and equipment are really hard to say. I didn't go to see it.