In dining rooms and canteens many people move around and high sound levelsresults from speech and steps as well as clatter from glass and plates At thesame time many people come to this environment to relax and talk to each other

What is the correctly punctuated version of this sentence?
In dining rooms and canteens many people move around and high sound levelsresults from speech and steps as well as clatter from glass and plates. At thesame time, many people come to this environment to relax and talk to each other.