Is there a way to use punctuation in Siri dictation?
http://howto.cnet.com/how-to-make-siri-use-punctuation/8301-11310_39-20124379-285.html

To get Siri to use punctuation, you only need to speak the punctuation during the composition of your message. For example:


  Hi comma how are you question mark did you see the game last night
  exclamation point question mark.


Speaking that exact line to Siri would equate to the following message:


  Hi, how are you? Did you see the game last night!?