hi @asifkhan2017 welcome to the community. Any particular reason you must use DL/Keras? You are very likely to have an overfit model.
As to general sentiment analysis, I'd get started with the "Extract Sentiment" operator in the Operator Toolbox extension and look at the tutorial process.
As to general sentiment analysis, I'd get started with the "Extract Sentiment" operator in the Operator Toolbox extension and look at the tutorial process.