Finding the optimal balance of assertiveness and empathy in customer interactions depends on various factors, such as the customer's personality, mood, expectations, and goals, as well as the nature, purpose, and stage of the interaction. There is no fixed formula for finding the right balance, but there are some general guidelines to consider. If you are too aggressive, try to tone down your assertiveness and increase your empathy by listening more, interrupting less, asking open-ended questions, using positive language, and showing appreciation and respect for the customer's feelings and opinions. On the other hand, if you are too passive, try to boost your assertiveness while maintaining your empathy. Speak up, state your opinions confidently, offer solutions, use confident language, and demonstrate competence and value for your own feelings and opinions. Finally, if you are assertive already, try to match your empathy level with the customer's by observing their verbal and non-verbal cues, mirroring their tone and pace, empathizing with their emotions, and validating their needs and perspectives.