You learned kein, keine, kein, keine back in lesson 7.3 as answers to Ja-/Nein-Fragen. You can also simply use them in sentences to say everyday things like "There is no bread in the house" or talk about the fact that "Serena Williams will play no more professional tennis matches."
This is how you negate information.
Review the transcript, study the lesson and do the quizzes: www.newsinslowgerman.com/series/guts/12/transcript