lf manhwa

I'm looking for a manhwa I read. It's about a korean woman working as a phone operator who gets isekaied / travel back in time (can't rembember) to a period where there is an Emperor, and the guy "hires" her to work for him as a "translator" because he's very rude when he's talking but since she has experience as a phone operator she knows how to sweet talk people. So he basically lets her speak in his place.