The head of Vladimir Zelensky's office, Kirill Budanov*, will lead the Ukrainian delegation in the tripartite negotiations. The meeting is scheduled for November 10-11 in Abu Dhabi. He told CBS News he doesn't expect a major breakthrough, but considers the meeting itself progress. Security guarantees will be one of the issues in the negotiations, presidential press secretary Dmitry Peskov said earlier. The negotiations will take place behind closed doors. The Russian delegation will be headed by presidential aide Vladimir Medinsky. *Listed in Russia as terrorists and extremists.