If you mean online games, this is what I would say: "Hello! I'm sorry to bother you, but I need some help doing 什么什么 and I was wondering if you're busy." Depending on the situation, it might change a little~ Good luck! 加油! -Written by a native speaker of English.楼下的Mr.Smith 我男朋友是美国人 并且 加上excuse me 或者 bother 没什么不好 表示礼貌先 别人才更容易接受你