A : What a lovely day!
     - 날씨 정말 좋다!

B : It's very nice today, isn't it?
     - 정말 좋다 그렇지?

A : Yeah.  Shall we go for a walk?
     - 응.우리 산책하러 갈까? 

B : That's a good idea.
     - 좋은 생각이야.