You may intend to be efficient while a colleague experiences your short response as dismissive. Begin by acknowledging the effect of your behaviour before explaining what you meant. Ask for a specific example so you can understand the interaction.
Before your first meeting, name the emotion you are bringing into the room. Add a brief description of its intensity and the event that may be influencing it. Then ask what you need in order to participate constructively.
Think of a recent moment when your reaction felt stronger than the situation required. Write down what happened, what you assumed it meant and what you felt before you responded. Separate the observable facts from your interpretation.