Hi Waiti
Thank you very much for your reply.
I 've found sth on that subject.
In hotels and certain other facilities, a
concierge assists guests with various tasks like finding taxicabs, restaurants, and interesting places to visit. In upscale establishments, a concierge is often expected to "achieve the impossible", dealing with any request a guest may have, no matter how apocryphal or strange, relying on an extensive list of personal contacts with various local merchants and service providers.
Front-desk clerks. They register arriving guests, assign rooms, and check out guests at the end of their stay. They also keep records of room assignments and other registration-related information on computers. When guests check out, desk clerks prepare and explain the charges, as well as process payments.
Regards
Dominik