Jobs in hotels

receptionist person who deals with your reservation, booking and payment in a hotel. He or she usually works behind a large desk in the main area of the hotel lobby or entrance hall
You need to ask the receptionist if you want a wake-up call in the morning 

porter person who carries your suitcases to your room when you first check into a hotel
Just give your bags to the porter. He'll take them up
 

concierge
person who greets you at the hotel entrance. He or she can also help you hail a taxi, recommend restaurants, theatres etc. in the area
The concierge said the Italian restaurant on the corner had really good food
chambermaid
person (usually a woman) who cleans hotel rooms
She works as a chambermaid and has to make hundreds of beds every day

housekeeper
person who is the manager of all the chambermaids in a hotel
We need all the chambermaids to work weekends when the hotel is very busy. If you can't work on Saturday, you'll need to speak to the housekeeper