If a person you didn't know told you they're killing themselves today would you try to stop them?

what are the reasons you would have for doing so? or would you not try to stop them? please don’t turn this into a ‘suicide is selfish’ spiel, as all of us are selfish at one point or another and therefore you’re no one’s judge…also i don’t believe in sin so this isn’t the time to discuss that either…the reason why I’m using a stranger instead of a loved one is so that that ‘because i love them’ is not a reason for you trying to talk them out of suicide…