You know the moment: a silence sets in, your mind goes blank, and the harder you search for "something interesting to say", the less it comes. Good news: the problem is almost never a lack of wit. It's a matter of where your attention is pointed, and that can be fixed.
Why your mind goes blank
When you're afraid of not knowing what to say, you focus on yourself: "am I interesting? do I look stupid?". This self-monitoring takes up all your mental bandwidth, precisely the bandwidth you'd need to listen to the other person and respond. The result: a blank. It's not that you have nothing to say, it's that your attention is pointed in the wrong place.
The shift: from "being interesting" to "being interested"
The research is surprisingly clear here. A series of studies at Harvard by Karen Huang and colleagues shows that people who ask more questions, especially follow-up questions, are judged markedly more likeable. We think we have to shine to be liked; in reality, it's the genuine interest you show in the other person that creates the bond. And asking a question takes far less energy than coming up with a brilliant line.
Sociologist Charles Derber described the opposite trap, which he calls "conversational narcissism": constantly steering the exchange back to yourself ("oh yes, me too...") instead of supporting what the other person just said. Simply being aware of it already changes the way you listen.
Listening, really
Work by Guy Itzchakov and Avraham Kluger on "high-quality listening" shows that a person who feels truly listened to becomes more open, more nuanced, more at ease. In other words, listening well doesn't just rescue you from the blank: it makes the conversation better for the other person too. It's the opposite of the idea that you have to "put on a show".
What it changes in practice
You don't need a stockpile of topics or to revise before a party. You need to redirect your attention to the person in front of you, and a few simple reflexes to follow up, tell a story, and respond. That's exactly what the guide "Being Likeable and Charismatic Can Be Learned" details, in its chapter on the art of conversation: how to never run dry again, without playing a role.