"네, 잘 자요!"
번역:Yes, good night!
August 2, 2014
안녕히 주무세요: Like how kids would say to adults. It is an honorific phrase.
자요 밤이다: (???) Never heard it said in Korea.
잘 자요 : The honorific form of 잘 자. Informal and less respectful compared to 안녕히 주무세요 (well, that is how I see it).