punctuation for dialogue. The standard style guides (for American English) say that the tag (he said, she yelled, asked Emma, etc) are treated as part of the sentence, separated from the actual disalogue by a comma in place of a period. It should not distract from the dialogue itself, ‘said’ usually suffices. Dialogue can be broken by ‘beats’ instead of tags. Which is an action that accompanies the dialogue. This would be written as a separate sentence.