Users in waiting to be assigned empty seats upon availability instead of an email.

# Overview
Currently, the users in waiting all receive an email informing them when a seat becomes vacant. (or atleast it's supposed to if email has been implemented.) Instead, users in waiting should be ordered based on first-come come first-served serve and whenever a seat goes vacant, that seat/seats should be assigned to them (max of 2 seats to be assigned to them if 2 seats are available).

Hence, you must keep track of which users came joined the waitlist in what order and assign seats to them and generate their ticket automatically.
*Extra Bounty Points* if you email the ones who have recieved the seats informing them of it and sending the ticket too.