Entschuldigung, wo kann ich einen Kaffee trinken? – In der Cafeteria.
Und wo ist die Cafeteria? – Die Cafeteria ist in der dritten Etage.
The dative
You already know two cases that a noun can take: nominative and accusative. The third case is dative, in which all the articles change.
| Dative | |
| masculine | |
| (der Flur) | dem Flur |
| einem Flur | |
| feminine | |
| (die Cafeteria) | der Cafeteria |
| einer Cafeteria | |
| neuter | |
| (das Büro) | dem Büro |
| einem Büro | |
| plural | |
| (die Konferenzräume) | den Konferenzräumen* |
| Konferenzräumen* |
*In the dative it is not just the article that changes. Most nouns have the ending -n in the plural. Exceptions: nouns that end in -n or -s do not get an additional -n.