If it's just a matter of wanting to print text with keypresses in between sections, you can use Basic Screen Effects by Emily Short, which allows you to use the "wait for any key" phrase:
Include Basic Screen Effects by Emily Short.
Place is a room.
Instead of listening:
say "You can hear them talking in the next room....";
wait for any key;
say "'Hi,' says Sally.";
wait for any key;
say "'Hey,' says Joe.";
wait for any key;
say "'So...' says Sally.";
wait for any key;
say "'Um...' says Joe."
Not sure if that will work for what you have in mind or if there was something fancier you were going for w/r/t conversation.