porazgovarati

1. (with someone, about something) to have a talk; to have a word with
   Moramo ozbiljno da porazgovaramo o tome. — We need to have a serious talk about it.
   Porazgovaraću sa šefom sutra ujutru. — I'll have a word with the boss tomorrow morning.

Usually porazgovarati sa kim (with someone) and o čemu (about something).