第一句：But the service will be continued.

但是我们的服务不变。

A: Have you received our circular?

您收到我们的通知了吗?

B: No. I haven't seen any letter from you.

没有。我没看到任何发自你方的信件。

A: We want to announce the reorganization of our firm. But the service will be continued.

我们想通知你方我方改组了。但是我们的服务不变。

B: Oh, that's big news.

噢，这是个大新闻啊。

第二句：We would assure you that any commission with which you may favor us will receive the same care and attention as in the past.

我们保证像过去一样关注和重视您委托给我们的工作。

B: We do appreciate your consideration.

我们很感激你的考虑。

A: You are welcome.

不用谢。

改组时务必要集中管理证券。

其他表达法：

I advise you that the business hitherto carried on in the name of J.M.&Co. will be continued under the style of James Morton& Company, Limited. We promise our cordial service as usual.