Other than using TAGs, another way to mark a conversation a customer care agent is having with a customer is to associate it with a Subject. A subject in Audite Cloud is composed by 3-levels: each level is an Argument that, after having been created, might be used in different subjects that can be used to classify a customer interaction. A first level argument is tipically a macro-category to classify the interaction (e.g. Request for Information, Complaint, Issue, etc). A second-level argument is used to introduce a further classification for the macro-category defined at the first level (e.g. Request for Information > Postpaid tariff, Request for Information > Add-ons services, etc). A further specialization can be defined specifying the third-level argument that, together with the other two, identifies exactly the reason why a customer is contacting you (e.g. Request for Information > Postpaid tariff > Tariff X, Request for Information > Add-ons > 10 GB promo).