Since March 2017, the cost of denied boarding began to draw all Brazilian airlines' attention because of the Resolution 400 of the Brazilian National Civil Aviation Agency. This Resolution covers several items, but we will focus on the penalty that the airlines need to pay for each passenger who had his boarding denied involuntarily in domestic flights. Our goal is to create a plugin that any airline could use in their self-service check-in channels and direct communication with the passenger. It could also become a way to offer proactive accommodation options and monetary compensations due to itinerary or ticket schedule change.