People have been asking me how to improve conversational skill. The reason I see for not able to continue a conversation or engage in a conversation is the lack of vocabulary and knowledge of the subject in discussion.
If you have limited vocabulary, you might struggle with words for expressions. If you know very little of the subject in discussion, you might have trouble jumping right into the subject and providing your point of view. To conquer both issues and improve your conversational skill, you need to read more.