Open AI node in n8n to keep user and message (GPT 4)

I am developing a workflow that generates different paragraphs for me. But all the paragraphs are related.
I want to use chain thinking and want to keep the user and message separate.
the open ai node is in a loop
Is there a way to append the user and message programmatically, or do I need to create a customized node?
I have been stuck on this issue for a while, I would really appreciate some help.
Thank you in advance.

Additional info:
Im running n8n locally using npm.
Operating system: windows 11.
n8n version: 1.0.1