Magic doesn't necessarily imply that, but certain magical paradigms would allow one to have such interactions, yes. The question then would be if you're interacting with a "real" soul or some kind of simulacrum generated by your magic, and that's a whole ass discussion that would be interesting if we had more main characters immersed in that side of the setting, but S-N's story focuses on other matters. Maybe someday, in one of the short stories, we'll tackle the issue in more detail.