Cancel Button?

Hey all:

I have looked in the Community and did not come across an answer, so if I am wrong and there is one please point me in that direction:) With that said, I am creating a light box form that will be placed on our Resource page. I would like there to be a "cancel" button available in addition to the "submit" button. Does anyone have advice on how to do that. Please note that I am very new to creating all of this, so simply clear steps are soooo appreciated. Thank you in advance:)