Which room have you assigned me?
as-se-GNA-to — four syllables, stress on the third. The 'gn' is a palatal nasal, like 'ny' in 'canyon'.
When you want to confirm your room number after a confusing check-in, or when you suspect a different room from your booking was given.
'Ha assegnato' is the passato prossimo (present perfect) of 'assegnare' (to assign). Using 'Lei' form ('ha') shows formal address to the receptionist. This is a polite but assertive way to clarify your assignment if there is any ambiguity.
Ho richiesto una camera sul davanti.
I requested a front-facing room.
Assert your specific room preference if it was not honoured
Avevo chiesto una camera non fumatori.
I had asked for a non-smoking room.
Use the trapassato prossimo to indicate a prior request
La camera che ho prenotato era diversa.
The room I booked was different.
Use when there is a clear discrepancy with your original booking
Room type terminology is a frequent source of confusion for English speakers in Italy. 'Doppia' (double) means two beds, while 'matrimoniale' means one large bed. Always specify 'matrimoniale' if you want a bed to share with a partner.