It reefers to the clerk at the front desk. The front desk is the desk "at the front", in other words, the desk that communicates to the outside and receives incoming customers.

Example: the front desk clerk in a hotel is the person behind the counter who attends to guests needs i.e. check-in, check-out etc. A concierge is the doorman whom also handles your luggage.

the concierge means doorkeeper ??????

thank you Ms Tyleen

Basically it means ask the secretary, the person working the front area at the desk, the concierge.