what a pleasant surprise! Haven`t run into you for ages!译：真没想到在这里遇见你!我们好久没见了!
it is a long time for us to see each other.译：我们好久没见了吧.How are you going on?译：你过的还好吗? 不过你要的是对话呢?还是开头要说的呢?