That’s what I do. I don’t write out Lucifer’s pathworking unless I am summoning only Lucifer, but I write out the others in my journal before performing the ritual. I like to perform the summonings by candlelight since it is more atmospheric and the darkness helps me keep my focus inward. Having to flick through a book (electronic or physical) and hold it and stuff would also prevent me from being fully immersed in the presence of the demons.
Beneath the pathworkings I write my request. This I usually keep as the exact (or close to it) wording as the power of the demon is described in the book. So when summoning Maggid, my request would be that Maggid allow others to bestow gifts upon me. If summoning Parelit, I would request that Parelit compel [name] to decide swiftly and in my favor. I do not specify the decision in my actual request, but I do elaborate on my reasons for summoning the demon beneath my request and/or on the back of the page. The reason for this is that it allows the demon space to act while making my desire clear.
It seems that you may have also missed an important detail from the instructions. This is natural, which is why I have read the book many times, and would encourage you to re-read the text on occasion to catch things you may have missed and allow for an evolved understanding to arise. When you thank the demons at the end of the ritual, you are not thanking them for the results. That would be pushy and presumptuous. You thank them simply for being present and for hearing your request. That is all.