The negotiation process itself need not be detailed, with its myriad of contacts and alternative thinking patterns continuously honing the work experience of the members of the Ministry of Foreign Affairs.
Contacts between civilizations should naturally be such that communication difficulties are the norm. It's just like when Earth Civilization holds global conferences, and various countries probe, bicker, and denounce each other over trivial matters for who knows how long.
Between civilizations, the issues are even more pronounced, as reaching an agreement that satisfies everyone has never been an easy task...
Moreover, the Glizerians' rest and activity habits differ from humans, as they only hold meetings every month or two. To the Glizerians, the current efficiency of their work is outrageously high!
These intermittent meetings are frustrating and painfully difficult to endure.