This dataset is dialog dataset collected in a Wizard-of-Oz fashion. Two humans talked to each other via a chat interface. One was playing the role of the user and the other one was playing the role of the conversational agent. The latter is called a wizard as a reference to the Wizard of Oz, the man behind the curtain. The wizards had access to a database of 250+ packages, each composed of a hotel and round-trip flights. The users were asked to find the best deal. This resulted in complex dialogues where a user would often consider different options, compare packages, and progressively build the description of her ideal trip.