Did Zelenski get instructions before gathering Trump?

In fresh days, Susan Rice, was a national safety advisor in the Obama administration, sparked a storm with her comments on Donald Trump's gathering with Volodymyr Zelenski. He claims that it was “set”, suggesting that there was a greater political intrigue behind it. What were the real scenes of this conversation, and who actually controlled it? Zelenski would get secret instructions before gathering Trump. Rice reveals the scenes – who advised Zelensk? Susan Rice explicitly admitted that in the background of the Trump-Zelenski gathering there were previously concluded agreements on natural materials. Furthermore, she pointed to the deficiency of "specific" safety guarantees, which can be interpreted as a deficiency of engagement of US troops in Ukraine.