"Maybe we should wait to begin until everyone is seated," Ana said to her band mates.
The defendant stated that she was, "not guilty."
Yes, you have punctuated the sentence correctly. In the sentence, you have included the direct speech (dialogue) of Ana by using quotation marks. Additionally, you have properly used a comma to introduce the dialogue, and another comma to set off the attribution phrase (Ana said) from the dialogue. Well done!
