Greetings and welcome to the Community, @Ashutosh_Freelancer 
Thanks for sharing your thoughts!
From what you’ve described, this seems like it would work better as an additional feature for your feeflow and AI booking agent projects rather than as a standalone widget.
Since our widgets are designed to be installed on websites and interacted with directly, we wouldn’t be able to implement this use case.
However, we have an Appointment Booking app. If you’re interested in this app, we already have a request for the SMS and WhatsApp reminders and you can upvote them here:
Additionally, you can change our game-changing AI Chatbot app, which you can also find helpful. Feel free to check it out and ask questions if anything comes up 