The interaction overview diagram for the ATM withdrawal system starts with the user entering their PIN. If the PIN is incorrect, the user is asked to try again; Otherwise, the square interaction represents the user's interaction with the ATM machine up until the transaction is completed. if the transaction is successful, cash can be retrieved; otherwise, an error message is displayed to the user. Both results are combined into a fork, which end with taking of the card and has the effect of completing the process at the end point.
