>>34601879 Not true, basically everyone who does this, does this accidentally, from my experience. >>34601862 Talk louder, and begin talking sooner. You're probably talking too quietly/starting too late for the chatty person to register that you've started speaking.
>>34601862 If absolutely necessary, hold up one hand in front of you, palm towards them, look them straight in the eye, and say firmly "Excuse me! I wasn't finished."