Вопрос по английскому языку:

Помогите пожалуйста))
Complete the following sentences with the appropriate word.
1. A hotel worker who stands by the door and helps the visitors to get out of the car is called: .
2. A hotel worker who receives new guests and gives them a room is called :
3. A hotel worker who keeps the rooms in order is called:
4. A hotel worker who receives and gives the keys is called