[@Burning Kitty] What books are you reading?

Different resources for writing dialogue; [url=http://writerlylife.com/home/2010/09/how-to-use-dialogue-correctly/]1[/url]. [url=http://english.stackexchange.com/questions/62536/should-you-always-start-a-new-paragraph-when-starting-a-new-speaker-even-if-the]2[/url]. [url=https://litreactor.com/columns/talk-it-out-how-to-punctuate-dialogue-in-your-prose]3[/url]. 

Literally every book sitting on my bookshelf gives a new speaker a new line.