Just attach a collision box to your player and/or the NPC, set collision box collision settings to overlap, and add an OnBeginOverlap event to one or both actor(s). There are many tutorials on youtube, find a basic one below:
Just attach a collision box to your player and/or the NPC, set collision box collision settings to overlap, and add an OnBeginOverlap event to one or both actor(s). There are many tutorials on youtube, find a basic one below: