1. A dialogue system for the examination of a laser cutting operation which is carried out on a laser machine tool to establish a proposal for improving at least one quality feature of a subsequent laser cutting operation, the dialogue system comprising: input means through which an operator can identify the quality feature that is to be improved; and a proposal module that is configured to access stored expert knowledge, and to provide at least one proposal for improving the quality feature, wherein, to provide the at least one proposal, the proposal module is further configured to read data provided from a sensor system of the laser machine tool and image data of at least one laser cut edge of a processed metal sheet together with associated metal sheet material and processing data.