A. I had pizza yesterday
B. Really? Wow! Do you have pizza often?
A. Yes, I do. I have pizza almost everyday. Did you have pizza yesterday.
B. No, I didn't. I had broccoli.
A. Are you having pizza tomorrow?
B. No, I am not. I am having a sandwich tomorrow.
I believe you mean conflict. To answer conflict defines as a disagreement between two parties. To summarise it means a bad thing not good
More information is needed to help answer your question :)