Trigger Event

Hello im a total novice with blueprints. But have manged to set up a level with some basic AI. Where an NCP runs away from the player, along path nodes. I am trying to set up some kind of proximity event on the NCP so that when the player catches up with it, it will stop running and start an animated cut scene.
So what i really need help with is the proximity event. How does one go about that please?
Thank you in advance for anybodies help.