Talking is not necessarily bad; in fact expression and language are incredible gifts that allow us to communicate with one another. Sometimes people think that talking is the opposite to listening, that interruption is bad, actually sometimes the opposite is true. Interruption can occur when people are listening, when they are affected beyond their ability to refrain. There is a massive transfer of energy, it may not be courteous, but they are listening.
You can learn a lot if you listen while you talk, you can tell when people switch off, you can sense when you are boring them, you can sharpen your technique. Don’t be afraid of interruptions, let go off your need to control the situation and enjoy the fact that you are connecting.