Translation of Heftmaschine

I need to write you one more sentence. This is what my teacher told me and the German language is so difficult. So please, as a last favor, would you please write the sentence for me in German?
I therefore created our pages so that the user can view several demos and click the Conjugate button in the Verb demo which will redirect him to the verb conjugation page of specific tenses.
The travel agent's representative promised that they would return us the difference of the money. They also assured us that we would get special treatment, such as extra drinks and a Kayak expedition.