I know, your next question is going to be: Hey, MY dialog
doesn't look like that!
Sorry, I was having a bit of fun. I had mocked this dialog up
to pull a prank on someone else, so thought I'd use it again. After
all, I'm a fun lovin guy at heart.
Now for the answer to your question. There simply is no way
I'm aware of to cause the behavior you want. As you have seen, the
audio seems to have to play out in its entirety. However, one way
you may be able to stop the audio is to insert a button that is
programmed to move to the next slide.