Hello Nishit thanks for your message, for your #10029 it is a qood question we did not received any details for notifications emails structure which means this task maybe build up in the further jobs. Meanwhile please use the current notification template juts separating them by title Purchased, Reserved or notifying.
Also please put a simple notification text (that i believe currently exist) while notifying about released numbers.
As per purchasing numbers please set up a text that notifies site admin about those numbers that are purchased or reserved.
The priority for now is to complete this job as soon as possible and later on we will let you know about some adjustments or addons that we would like you to develop with an other job and separate budget.