Really, it applies to all NPC's, and don't tell me it's "for atmosphere". Stand within earshot of Eithne, the only NPC in the middle of Cloisterwood and she cannot go even TEN (10) seconds without asking "Do you have it? Do you have the book I seek?"
It's not like this is a surprise, it was known from D:OS 1 and it was much-complained about then. I even pleaded with Larian to specifically NOT have any NPC chatter in D:OS 2 for this reason. How is the exact same "NPC verbal diarrhea" problem happening?