玩得开心是Have fun!Enjoy yourself!
聊得愉快是 Nice chat with you.
顺便纠正一下,英文里面不能在一句话里放两个并列的句子,要非得用一句话就得加and,譬如：Have fun,and nice chat with you.不过我个人觉得还是分成两句话更地道一些.希望LZ满意