David’s workshop focused on creating good dialogue, meaning:
Dialogue with rhythm (short sentences, smaller words)
Repetition (the same words are said over and over)
Interruptions (character’s don’t let others finish)
Indicated with a dash --
Trailing off (character’s struggle to say what they mean)
Indicated with ellipses …
The exercises focused on creating “good dialogue” through characters with clear wants. Take a look here for plenty of great writing exercises and the difference between good and bad dialogue!