how to say hello…
안녕! = hello or goodbye (when saying to your friend or someone younger than you)
안녕하세요? = hello? (saying hello to someone older – formal Q & A)
안녕하십니까? = hello? (more formal Q & A than 안녕하세요)
(만나서) 반갑습니다 = nice to meet you
안녕하셨(십니까 / 어요)? = how have you been doing? (십니까 more formal than 어요)
아 예, 잘 있었(습니다 / 어요) = I’ve been doing good (answer to question above – 습니다 more formal than 어요)
잘 있었어(요)? = are you doing well ? (when ask to friend or someone younger)
잘 있었어 = i’m doing well / i’m good (answer to question above)
어서오세요 / 어서오십시오 = welcome
how to say thank you…
고마워(요) = thank you (saying thank you to your friend or someone younger)
감사합니다 / 고맙습니다 = thank you (formal way to say thank you)
천만입니다 / 천만에요 = you’re welcome
how to say goodbye…
안녕히가세요 =goodbye ( saying to people who will go)
안녕히계세요 = goodbye ( saying to people who will stay)
잘 가세요 = goodbye and be careful
어서가세요= you’re free to go (say to someone who is in hurry- formal)
어서가 =go (say to friend who is in hurry- informal)
if there is work/service involved, use goodbye statement below :
수고하세요 = thanks for the hardwork, continue your good work (may use to person who still work)
수고하셨습니다 = thanks for the great job you did ( say to the person after all the work is done)
if you’re saying goodbye when u’re supposed to come back, then u can say :
다녀 오겠습니다 = goodbye (when u’re supposed to come back to the first place, and usually when u just go for a while, not more than a day)
다녀 오세요 =response to greeting above ( say to people who are going and supposed to come back)