Focus on the traits, skills, and experiences that helped you diffuse the disagreement. Talk about a time you resolved a conflict with your boss where you both compromised and came to a mutually beneficial resolution. This allows you to speak confidently about the situation, show off your conflict resolution skills, and prove that you are amenable to compromise. Use the STAR method when answering this question - this ensures you include all of the important pieces of your story: Situation, Task, Action, and Result.

"In my last job as marketing manager, I handled all relations with several large clients. One time, a dissatisfied client approached my manager about how I handled an email marketing campaign. My boss was upset and asked me to meet during lunch to tell me that she agreed with the client and that I had mismanaged the campaign. I'd spent weeks researching data for the campaign and putting all the pieces together. I felt I handled the campaign well. I knew I had to advocate for myself and explain why I executed the campaign the way I did. After listening to what my boss had to say, I realized a few corrections I could make in the future. I also knew that I had to make things right with the client. In the end, I learned a few new things about email marketing campaigns, and most importantly, I learned that my manager appreciated direct communication. She respected what I had to say, even if she disagreed. She appreciated my apology and quick resolution with the client. Following that conversation, we had a more open relationship. She felt comfortable giving me feedback, and I felt comfortable speaking up. I continued to manage that client account successfully for three more years."