The irony in "The Chaser"

Irony is the discrepancy between what is said and what is meant, what is said and what is done, what is expected or intended and what happens, what is meant or said and what others understand. The short story "The chaser" has many of these examples. For example, Alan is a young man looking for a love potion to make a girl he is interested in fall in love with him. The old man who sells these potions first talks about a "glove cleaner," which we later learn is an antidote to the love potion Alan seeks. The irony in this is the main character Alan thinks he wont have to go back for anything because he will be so happy, but the old man already knows that he will go back for the death antidote. In the end of the story, after Alan leaves the store, he says "Good bye" thinking he won't ever have to go back, but the old man says "Au revior" which in french means "see you later," because he knows that Alan will come back later.