I already download iOS 6 but I do not have siri
No, there is no Siri for iPad 2.
There is no Siri for the iPad 2. Says so right at the bottom of the iOS new features page at http://www.apple.com/ios/whats-new/
Its how they make us buy new stuff, its also why hackers exsit (no such thing as a portfor siri)
iOS 6: Which software features does my iPhone, iPad, or iPod touch support?
Hackers have existed for a variety of reasons but nailing on a half-***** version of Siri on a device that does not have the voice recognition/noise suppression to support it isn't a very good one.
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