Thank you did a hard reset and got it to work!If you're on an iPhone 4, you don't have Siri capabilities.
If you're on 4S or 5, try restarting the phone, then try it again.
If that still doesn't work, try a hard reset. Hold the power and home buttons together until it shuts off and restarts.
If it still doesn't work, you might need to restore it again.