Erma Felna EDF page 131

The empty dialog boxes are to indicate that while the characters might be talking aloud, they can't hear each other, so neither can we.
 
THE COLONEL
2016-11-22 00:02:57 
Things are getting...messy.
luisedgarf
2016-11-22 12:48:14 
I always thought you did forgot to put any dialog in the speech balloons or it was a mistake from the printers, but it turns out to be a artistic choice instead. Thanks for the explanation!