I'm going to say the dishes can wait
Why do you think dishes can wait?
I will say it because I'm not hungry, I want to eat the rest of the pizza
While chores are boring and work, it is not good to put them off. They will just increase in amount and number and will cause you more work in the future.
I don't feel like it. I rather have the pizza.
You can have pizza after. Plus, it would be more rewarding if you wait until the work is done.