In the second act , Monsieur Dufour , an inspecteur at the Conservatoire , writes a matrimonial advertisement in the newspaper .
In the second act , Monsieur Dufour , an inspecteur at the Conservatoire , ends up marrying his housekeeper , Mademoiselle Bonjour .
In the second act , Monsieur Dufour , an inspecteur at the Conservatoire , writes a matrimonial advertisement in the newspaper but ends up marrying his housekeeper , Mademoiselle Bonjour .