Translation of usefulness in German

Mr. Chang informed me that you have a customer that requires similar applications to what my customers have here in Switzerland. I am planning my next trip and I will consider visiting you too.
Thanks for the phone conversation. In the attachment, I placed a very brief overview of possible Spanish words that could be entered into the system for the vocabulary beginners lesson. Please have a look.
It was fantastic to see that each ice berg had its own form and color. Unfortunately we could not reach all galciers, some were blocked by their own ice breaking off and floating in the lake.