My owner's manual says that the Flexible Service System (FSS) is pre-set for the first oil change at 7,000 miles, which translates to 11,290 km, so your Chrysler dealer is correct.

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There seems to be this fallacy (here in the US, at least) that one must change oil every three months or three thousand miles. I think this is a load of crap because the people that are telling you that are the guys that make money selling you oil or doing oil changes! Do the oil changes at the intervals specified in the owner's manual or by the FSS. The guys that built the car know a whole lot more about what it needs than the guys at "Jiffy Lube." In the long run you will save money and the world will be a little cleaner because there will be eight less quarts of dirty motor oil around.
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Case in point: My '97 Prelude gets oil changes every 7,500 miles. It has 199,000 miles on it, still runs strong, and doesn't show any signs of stopping in the near future (excepting maybe the clutch, but that's another story ).