Translation of Zusammengehörigkeit

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?
Let me talk about nicer things in this email. In the last mail we spoke about the poems that we have read in our last spring break. We are not of the kind who love partying all night. We came to relax.
The same day that I gave my last presentation about our pilot project I flew away. The first lag was NYC's airport John F. Kennedy. I left Europe after midnight and arrived there at five o'clock, more or less.