Soo-a : "Take care of ji-ho. Love him lots for me. Stay by ji-ho's side for a long long time. And when you feel like your a burden to him, then come to me at the cloudland. I save you a spot beside me."
My only problem is why she didn't ask him to start dating again. I'm not saying he had to or it was certainly necessary but it was a thing she must have said at least.