I added some customized texts based on the lyrics of Abba songs that pop in randomly.
"Finally facing your Waterloo..." to declare war;
"Knowing me, Knowing you, it's the best we can do" to conclude negotiations;
"So when you're near me, darling can't you hear me, SOS!" to appeal for help;
"Can you hear the drums Fernando?" to send a warning to a rival (and an alternative declaration of war;
"I love you, I do, I do, I do, I do, I do" when things were really friendly;
"Take a chance on me..." or "Voulez-vous?" when offering a trade deal;
"Gimme, gimme, gimme.." when making a demand etc.