A Facebook Messenger Chatbot using NLP

This project is about creating a messenger chatbot using basic NLP techniques and models like Logistic Regression, Naive Bayes or a simple neural network. The code is then deployed on Heroku server to run as a Facebook chatbot app.

Installation:

• For creating Facebook app, please visit: https://developers.facebook.com/docs/messenger-platform/getting-started/app-setup/
• For creating a Heroku webhook, please visit: https://www.youtube.com/c/IndianPythonista/videos The videos in this channel are pretty clear.
• Setup virtual environment:

Use this command line: python3 -m venv venv (the last term 'venv' is where you input the name you want)

Then, to activate it on Windows: venv\Scripts\activate

• Install the required packages: After activating the virtual environment, use this command line to install all the packages specified: pip install -r requirements.txt
• Pushing code to Heroku: You can visit the git documentation page for clear instruction, or use these command in the given order:

git add .

git commit -m your_commit_message

git push heroku master

Usage:

When you finish your installation, you can just simply chat with the bot, here is an example of what you should get when complete the steps above:

The two images above are the results of my simple neural network model, as you can check in the code, the performance of this model on the test set in test_content.json is not as high as the other two models I create using Scikit-learn library. But with a lot more data and some fine-tuning (which you can play with on your own time), the neural network is expected to perform much better.

Customize for your own case:

I have already made some basic tags and responses for the bot, but if you ever feel the need to change the way the bot responses, you can always customize the content.json file just by creating some new tag and give possible patterns and responses for each tag.