Making chat bots for IRC, Discord, Slack, etc is one of my personal hobbies. I just created an event based IRC library so I definitely have experience doing what you need. I'm confident I can create an extremely lightweight bot that responds to your pre-defined triggers in a CSV file.
If you're interested or have any questions for me don't hesitate to send me a message. You can also check out my profile for more about my qualifications. I might not be the cheapest or the fastest freelancer, but I make sure it gets completed correctly the first time and with the best practices in mind. I'd love the opportunity to build this for you.