Hi, I am new to this and am trying to use Llamaindex to connect the MySQL database (80 tables) with the LLM(gpt-3.5-turbo) and used NLSQLRetriever-Text-to-SQL Retriever and developed a chatbot using Streamlit. My problem is that it is retrieving the proper responses often like invalid SQL query and so on. Can anyone help me with this, please?