What should a waiter do at the door of a five-star hotel?

Usually a concierge or doorman. What concierge usually does is to open the door for guests, take luggage, open the door, call a car, divert traffic at the gate of the hotel, and ask guests to park reasonably. And security. Usually, their duty is to divert traffic, guide guests to stop, and maintain the normal order and safety at the entrance of the hotel.