It was just small talk.
→ 별로 중요하지 않은 얘기였어.
※small talk : talk about minor matter rather than important matters.

〔예문〕

A : I talked to Se Ri Park Lotte Department Store's autograph session
     롯데 백화점 박세리 사인회에 가서 박세리랑 얘기했어.

B: Rally? What did you say to her?
   정말? 무슨말 했는데?

A:It was just small talk, not a real conversation.
   그냥 그런얘기,중요한얘기는 아니구.

*  autograph session  :사인회.=  autograph : 자필,친필 + session   : 회의,회합.