1 no meaning, just ends conversation, like "ok, all right..." 2 maybe they discussed something, like "let's do it as disccused"

“那就这样吧”，在中文口语中是很常用的，一般表示一段对话的结束，也有“就到这里吧”、“到此为止吧”的意思。相当于英文口语中的“ok, that's it.”。

i agree with dan, means end, , and remind the other side , do you still have something to tell me? if not i will hang up.

"那就这样吧"一般在电话中用的比较多，表示再没有其他什么要说的了。

usually when you want to end a conversation, you can say it.