I"ve played many visual novel styped games where there was a button that you could press that toggles auto progression of the dialog boxes based on the voices.

And many had options as to how much of a delay there was between the voices ending and the dialog progressing.

I would actually like this feature here as well...
As there's been times where I thought the dialog had ended, but there was just a pause and I ended up skipping some of the voice due to pressing too early.