フリオさん、きょうもありがとうございました。 You practiced phrases to invite people today. すみません、ちょっと..." is a useful phrase when the word is "No". I'm not going" is a direct way of refusing and is not often used. またらいしゅう!
Even when you were tired, you did a great job:) It was a difficult lesson but a very important part so keep speaking in Japanese(ta-form,dictionary form,nai-form and nakatta-form).
I'm looking forward to having a lesson with you next week as well. Please have a good rest:)