Concern over accuracy of results

I am using Pandas dataframe to read the csv file and creating csv agent using OpenAI. when I ask questions, 50% of the answers are wrong. How can I improve the accuracy of the results.? the csv file is an effort tracker where my team updates their daily task and efforts in it. SO when I query to get the efforts for a particular resource in a given period for a specific task, the answer goes wrong sometimes.