Create a Python Script to Analyze Customer Review Sentiment

We have a small list of customer reviews and need a simple Python script that can check whether each review is positive, negative, or neutral. The goal is not to build a large AI system. We just need a clean and easy to run script that can process the review text and give the sentiment result in a CSV file. The task includes cleaning the review text, running sentiment analysis, testing it with sample data, and sharing the final Python file with simple instructions. Experience with Python, NLP, sentiment analysis, pandas, text classification, or machine learning would be helpful. Please share one similar example if you have worked with customer reviews, text analysis, or sentiment classification before.