Basic Talk!

예.
[ye]
Yes.
아니오.
[Anio.]
No.
네.(예.)
여보세요.
[Yeoboseyo.] (Hello (when picking up the phone).

This is the basic talk for a beginner. Lets learn.
안녕하세요.
 [Annyeong-haseyo.]
Hello. (when meet someone)
안녕히 계세요.
[Annyong-hi gyeseyo.]
Good bye (when you, the guest, are leaving).
안녕히 가세요.
[Annyeong-hi gaseyo.]
Good bye (when you, the host, are bidding your guests good bye).
어서 오세요.
[Eoseo oseyo.]
Welcome.
고맙습니다.(감사합니다.)
[Gomapseumnida. (Gamsahamnida.)]
Thank you.
천만에요.
[Cheonmaneyo.]
You're welcome.
미안합니다.(죄송합니다.)
[Mianhamnida. (Joesong-hamnida.)]
Sorry.
괜찮습니다.(괜찮아요.)
[Gwaenchansseumnida.]
It's all right.
실례합니다.
[Sillyehamnida.]
Excuse me.

Learn how to read in Korean here.