THE ANSWER IS: "안녕하세요"라고 말씀하세요 (말하라, 말씀하십시오...)!/안녕하세요"라고 하세요 (하라, 하십시오...)! In Korean, the situation is such: 1) you can use "-라고" and add before it the direct speech: 엄마는 저한테 "왜 숙제 안 하니?"라고 말했다. Mum told me: "Why don't you do your homework?" 2) for the indirect speech, the situation is a bit more difficult: a) when we have the narrative, we use "-ㄴ다고, -는다고, -다고" -ㄴ다고 for the verbs of action that don't have 받침 -는다고 for the verbs of action that have 받침 -다고 for the adjectives (verbs of state), verbs of action with -았(었,였)- and -겠- 매리는 그 꽃이 참 예쁘다고 했다. Mary said that this flower is very beautiful. b) when we have the question, we use "-(으)냐고" -냐고 for the verbs that don't have 받침 -으냐고 for the verbs that have 받침 김 선생님은 제가 왜 연습을 안 하냐고 물어봤다. Our teacher Kim asked me why I didn't do the exercise. c) when we have the order, we use "-라고" 형은 저한테 청소를 하라고 했다. Brother told me to clean up. d) when we have the urge, we use "-자고" 애니는 극장에 가자고 했다. Annie said: "Let's go to the theater." e) for the verb "이다" we have "-(이)라고" -라고 for the nouns that don't have 받침 -이라고 for the nouns that have 받침 그분은 "반지의 제왕"이 아주 재미있는 책이라고 했다. He said that "The Lord of the Rings" is a very interesting book.

Do you mean like...literally telling someone to say hello to another person? 인사 해. <---informal. 인사 해요. <-----Polite. You're telling someone to greet the other person.

안녕 = An nyoung = hello, (informal) 안녕하세요 = An nyoung ha seh yo = hello, (formal) 여보세요 = yaw bo seh yo = hello on a telephone

Or you can try this ; 안녕하세요. [annyeong-haseyo] = Hello. 안녕하세요. [annyeong-haseyo] = Hi.