Cancel Button Message

Hi,

I'm setting up a new site running Pro Sites.

Is there a way to filter/edit the message displayed to a user when they click the cancel button? This is the current message that I'd like to change to something else:

Please note that if you cancel your subscription you will not be immune to future price increases. The price of un-canceled subscriptions will never go up!

Are you sure you really want to cancel your subscription?
This action cannot be undone!

Thanks