Civ IV does not have dynamic conversations with world leaders, not even with the Rise of Mankind mod...but if it did, a recent conversation between myself and the leader of the Malinese would have gone a little like this.
Me: "I see there are some Zulus in my back garden now."
Mali: "Erm."
Me: "I thought I wiped them out."
Mali: "Well...they came back...they wanted their city back..."
Me: "Yes, and soon they will want the other cities I took off them back...and I don't like it when that happens. See, I gave that city to you so that the Zulus wouldn't come back again..."
Mali: "Well..."
Me: "So this time I'm going to make sure they don't come back...I'll burn down the bloody city and build another one in its place and I'll name it Rorkes Bloody Drift! If that doesn't keep them away I don't know what will!"
Mali: "What's Rorkes Drift?"
