Answer:
cognitive dissonance
Step-by-step explanation:
Cognitive dissonance -
It is a type of mental stress which is felt by a person , who have two or more contradictory ideas or beliefs regarding any action , is known as cognitive dissonance .
This problem increases due to any new idea or new approach .
hence , from the question , Jamie , being a good salesperson , after selling the car , wait at least for a week and then call the customer to to insure them for their good decision .
Hence , Jamie is trying to reduce cognitive dissonance .