Patrick Lane had worked as a salesman for Carson Group Inc. for twenty-five years; he had a territory covering all the Atlantic Provinces. Some adjustments had been made over the years, but all with consultation and his consent. In 2020, a new sales manager first refused to pay for Mr. Lanes travel expenses that had been paid in the past and then reduced his assigned territory substantially, by assigning Newfoundland and Cape Breton to another salesperson. That represented twenty-five to thirty percent of his income. In response to these actions by the new sales manager, Mr. Lane resigned and brought forward this action for wrongful dismissal. Patricks original employment contract stated he would be entitled to two weeks' notice upon termination. During the interim period up to the conclusion of the court proceedings, Mr. Lane made every effort to seek alternative employment.

What is the legal defense you would submit on behalf of the defendant, if any?