Oh, then even simple! In Vapi if you see and go to vapi.docs you will see all of their post and get methonds. Also if you want transfcript in each assistant you can use in the advance section to send all the call data and transcript. To send. Also for triggering the call make a post request to the assistatn by adding user info in the variables as the user data. So the assistant can dynamically call the user with their name and query.