Теория:

To speak about hotels and their facilities, you need to know the appropriate vocabulary.
  
Study the table.
 
Name
Definition
Picture
Example
to book a room
to reserve a room
book_a_room.png
Hello, I would like to book a room for 26th May.
to check-in
to register in the hotel
checkinh.jpg
To get a room key, you must check-in firstly.
lobby
the entrance way in the hotel
lobby.jpg
You can sit in the lobby and wait when the manager arrives to see you.
single room
a hotel room for only one person.
single.jpg
I am arriving alone, therefore I would like to book a single room.
double room
a hotel room for two people.
twin.jpg
Double room for two people will cost 50 euros.
twin room
a hotel room for two people, separated beds.
double.jpg
All twin rooms at the moment are booked.
suite
a luxurious hotel room.
suite.jpg
I believe to stay at a suite, you have to be a millionaire!
receptionist
a person who works at the front desk.
recep.jpg
I should call the receptionist and say that I need an additional pillow.
wake-up call
when a receptionist calls a hotel client in order to wake him up.
wake.jpg
Excuse me, could you please give me a wake-up call at 7:00, to room 202?
room service    
in a hotel, room        service is when someone serves you food and drink in your room
service.jpg
Darling, let's order room service and have champagne in the room!
chambermaid
a person who cleans rooms in hotels
chamber.jpg
Could you please notify the chambermaid that in room 581 all wet towels should be washed?
extra bed
an additional bed in the room
extra.jpg
We have an incoming guest, can we order an extra bed in the room?
 
 
Источники:
http://www.speakenglish.co.uk/vocab/hotels_and_accommodation
http://www.manythings.org/vocabulary/lists/a/words.php?f=hotel
http://dryicons.com/icon/travel-and-tourism-part-2/book-a-room/
http://thesceneisdead.com/2013/06/06/edc-vegas-protip-16-have-one-credit-card-ready-for-hotel-check-in/
http://www.designwallz.com/luxury-hotel-lobby-interior-design-with-unique-chairs
http://www.keioplaza-sapporo.co.jp/english/accommodation/room/stylish.html
http://lepalace.gr/en/room/double-room-thessaloniki-2/