Translation of Informant

Dear Arnold, please send me David's contact details. I will arrange a meeting and present him the machine, so that he will know how to operate it properly. Thanks again and all the best.
We begin to talk about 'we' and 'they', which makes us partly discriminating. As a whole, I guess that all of us have some predispositions, but the difference is, that some know how to supress it.
She was a very cute twenty six year old woman from the area, had a perfect English and could be understood well. She told us to put on good shoes and we started walking towards the valley.