Do you have a moment? I'd like to ask you something.
'Vorrei' = vor-REY. Conditional of 'volere' — polite. 'Chiederle' = KYED-er-leh — to ask you (formal).
A polite opener before asking any question of a stranger or acquaintance — acknowledges their time.
'Ha un momento?' acknowledges that the person has their own priorities. 'Vorrei chiederle' uses the conditional 'vorrei' (I would like) + 'chiedere' + indirect object 'le' (to you, formal). This two-step approach — first asking if they have time, then making the request — is considered very polite in Italian culture and is more likely to result in a positive, engaged response.
Mi perdoni se la disturbo — ho bisogno di un'informazione.
Forgive me for disturbing you — I need some information.
'Perdonare il disturbo' (apologise for disturbing) is a very Italian social grace.
Scusi se interrompo — ha un secondo?
Sorry to interrupt — do you have a second?
Use when the person is clearly occupied.
Posso farle una domanda?
May I ask you a question?
Simpler, equally polite — 'posso' (may I) is formally correct.
Italian social etiquette places great value on acknowledging the other person before making a request. The phrase 'mi perdoni se la disturbo' (forgive me for disturbing you) reflects the Italian concept of 'rispetto' (respect) for another's time and attention. This contrasts with cultures where direct questions are considered more efficient — in Italy, the preamble is part of the communication.