Negative Yes / No questions with going to are formed as follows: Aren't I going to ....? (This is an irregular form.) Aren't you going to ....? Isn't he going to ....? Isn't she going to ....? Aren't they going to ....? Isn't it going to ....? Isn't Carlos going to ....? etc.
A: Aren't you going to come to the party? B: No, I have to work.