Getting input with the speech recognition (speechRecognized)

I want have this code

Edi.speak ("would you like more information")

 bool accepted  = speechrecognized

If (speechrecognized = yes)
{
}

else
{
}

i know this is wrong but i want the user to say yes through the microphone and the statement is carried out when yes, but if the user says no it carries out the statement. how do i get the yes and no through to the if statement using speechrecognition. please forgive for lack of better way to explain my situation. Thanks