this python script send a whatsapp msg when slot are avaliable https://www.youtube.com/watch?v=rt5KTb53QL8 use this link for making a twilio account and enter the credentials and info according to you.
variable need to be editied in the script are:
account sid, auth token. trial whatsapp no. given by twilio, your whatsapp number used to setup twilio sandbox, your pincode..
open this twilio account only when you want to book appointment slot. because the free trails is for 3 days