I wish I had the right words in difficult situations

I work in a field in which I get to interact with clients (teenagers) everyday and they sometimes get in heavy situations and need to vent. I feel like I’m not really a good listener or conversationalist. I try my best to bounce back on their words but I find myself falling short. I feel like I’m not saying the right things at the right moment. I’m not making them feel better after we end the conversation. There were a few moments I was pride of my interventions but there are many more moments I felt awkward and not helpful.