1. Acknowledge that there is a problem.
2. Ask your coworker to set a time to meet with you privately to discuss the problem. (Make sure you allow enough time for you both to cool off.)
3. Focus on the problem, not the person. Look beyond the personality to identify the underlying issue.
4. Decide on a solution that is mutually acceptable. Remember, this isn’t about winning, it is about compromising to get past your differences.
References: The Customer Communicator.