中文翻译，不要机器翻译的。谢谢

Yes, no problem. We will keep you informed when the goods are ready.
Keep touch(直译）更好的，Feel free to contact us.

ok, no problem, I will inform you once our goods are ready.
Keep in touch.

Ok,no problem.I'll inform you after goods are completed.
Keep in touch!

手工翻译

that's all right.we will inform you after the delivery finished.keep in touch.