A service integration system for handling questions from conversational services comprising a processing unit configured: - to receive a request from a user; and - to forward the request to the conversational services; and - to receive in reply to the request respective replied questions from the conversational services; and - to group the replied questions in groups; and - to aggregate replied questions of a group into an aggregated question; and - to forward the aggregated question to the user, and wherein the processing unit is further configured: - to select a group comprising a highest number of replied questions; and - to forward the aggregated question of said group to the user, and wherein the service integration system further comprising a library, the library comprising: - a database comprising: o personal data of the user; and o a set of conversational services and assessment data comprising characteristics of conversational services of the set of conversational services; and - an interface configured to receive the request, and, subsequently to select a subset of conversational services from the set of conversational services based on the request and the personal data and/or the assessment data; and wherein the processing unit further is configured to forward the request to the library and to receive in reply the subset, and, to send the request to the conversational services of the subset, CHARACTERIZED IN THAT the interface is further configured: - to receive a replied question; and - to derive from the personal data one or more user answers as answers to said replied question; and wherein the one or more user answers are each linked to a probability factor indicative for a relevance of a user answer as an answer to the replied question; and in that the processing unit is further configured to forward a replied question of the replied questions to the library, and, subsequently to receive in reply one or more user answers and associated probability factors; and - to select a user answer having an associated probability factor exceeding a first predefined threshold as the answer to the replied question. - to receive a request from a user; and - to forward the request to the conversational services; and - to receive in reply to the request respective replied questions from the conversational services; and - to group the replied questions in groups; and - to aggregate replied questions of a group into an aggregated question; and - to forward the aggregated question to the user, - to select a group comprising a highest number of replied questions; and - to forward the aggregated question of said group to the user, - a database comprising: o personal data of the user; and o a set of conversational services and assessment data comprising characteristics of conversational services of the set of conversational services; and o personal data of the user; and o a set of conversational services and assessment data comprising characteristics of conversational services of the set of conversational services; and - an interface configured to receive the request, and, subsequently to select a subset of conversational services from the set of conversational services based on the request and the personal data and/or the assessment data; and - to receive a replied question; and - to derive from the personal data one or more user answers as answers to said replied question; and wherein the one or more user answers are each linked to a probability factor indicative for a relevance of a user answer as an answer to the replied question; - to select a user answer having an associated probability factor exceeding a first predefined threshold as the answer to the replied question.