I would like a double room with a private bathroom.
'Privato' — stress the second syllable: 'pri-VA-to'. 'Doppia' — 'DOP-pia', stress the first syllable.
Use to specify the room type clearly. 'Bagno privato' is important to mention — some budget Italian hotels still have shared bathrooms.
'Camera doppia' = double room (with a double bed or twin beds). 'Matrimoniale' specifically means a double-bedded room. 'Bagno privato' = en-suite bathroom. 'Bagno in comune' = shared bathroom — something to avoid if not expected.
Vorrei una camera matrimoniale.
I would like a room with a double bed.
'Matrimoniale' specifically means one large double bed, from 'matrimonio' (marriage)
Avete camere con letti singoli?
Do you have rooms with single beds?
'Letti singoli' = twin beds (two separate beds)
Vorrei una camera con vista sul mare.
I would like a room with a sea view.
Adds a view preference — 'vista sul mare' = sea view
Italian room categories can be confusing. A 'camera doppia' may have either one double bed or two single beds — always clarify. A 'camera matrimoniale' has one double bed. 'Camera singola' = single room. 'Suite' = suite, but is pronounced 'SWEE-te' in Italian.