Verb conjugation of "verdünnen" in German

My boss offered it to me, so that a few more people at work will have a good level of English and now I really have to kick my own ass (I've started last year and it's not going very well).
Somehow, my email was not sent. There were even a few mistakes, but really only minor things, nothing really bad. I've already read some other texts that you have sent and are getting better each time.
Have I forgotten to tell you my name because you see only the usernames. I'm sorry for that. You are right the username ---- stands for Gabriel. Besides, I'm completely healthy again, thanks.