Hello.

你好！

I'm writing to a friend of mine in South American.

我在写信给一个美国南部的朋友。

When you called me, I was eating dinner.

当你打电话给了我时，我正在吃晚饭。

It's been cloudy all morning.

整个早上多云。

Would you like to go for a walk?

你想去散步吗？

I wish you would give me a more detailed description of your trip.

我希望你将给我更详细地描述你的旅行。