Korean is one of the most strict confucian country in the world. Thus Korean have been educated to respect older people eventhough 1 year gap. That's why Korean have many levels of honorific expression in their language. Therefor you have to use honorific expression when you talk to your boss.

When you introduce yourself or talk to someone who hasn't ever met before, you should speak to them in a very polite way even if they are the same age as you or younger than you. I wonder you already know that there are six different speech styles depending on politeness, social relationships or intimacy, etc in Korean. For example, When you meet somebody for the first time, you probably could say "만나서 반갑습니다" not "만나서 반가워" as for "nice to meet you". As to "Hi" or "Hello", you should say "안녕하세요" not "안녕".^^/ The first sentences I put as example are called "존댓말" which is used for your boss, totally strangers, anyone who is older than you or someone who allows you to use "반말" like the second sentences above. Here are some more examples, (polite version) 안녕하세요. 만나뵙게 되서 반갑습니다. 저는 (your name)입니다. = my name is (your name) Depending on politeness and fomality, "nice to meet you" would be... 만나뵙게 되서 반갑습니다. (polite and formal) 만나서 반가워요(polite and informal) 만나서 반가워(intimate and informal) There are three more styles, but the three styles above are often used in everyday Korean. \^o^/

sala mala kum