Combination of a Master-Dialog System and at least one Slave-Dialog System for implementing instructions of a user , with the Master-Dialog System being equipped with - an input module , into which the user can enter instructions in natural language, - an interpretation module , which interprets the instructions of the user and generates feedbacks in response to these instructions, - an output module , from which these feedbacks can be issued to the user , and - a communications module , which is coupled with the interpretation module and which communicates with at least one Slave-Dialog System , in order to implement user instructions, with this at least one Slave-Dialog System being equipped with - an input module , into which a user can enter instructions in natural language, - an interpretation module , which interprets the instructions of the user and which generates the feedbacks in response to the instructions and - an output module , from which these feedbacks can be issued to the user , with the input module and the output module of the Master-Dialog Systems being designed in such a way to enable the communication with a terminal device of the user by means of a first program, with which the user can also communicate with other users , this being characterized in that the Master-Dialog System has been designed to be able to communicate via different addresses with user terminal devices , with a functionality of the Master-Dialog System's interpretation module being dependent on the address used. - an input module , into which the user can enter instructions in natural language, - an interpretation module , which interprets the instructions of the user and generates feedbacks in response to these instructions, - an output module , from which these feedbacks can be issued to the user , and - a communications module , which is coupled with the interpretation module and which communicates with at least one Slave-Dialog System , in order to implement user instructions, with this at least one Slave-Dialog System being equipped with - an input module , into which a user can enter instructions in natural language, - an interpretation module , which interprets the instructions of the user and which generates the feedbacks in response to the instructions and - an output module , from which these feedbacks can be issued to the user , - an input module , into which a user can enter instructions in natural language, - an interpretation module , which interprets the instructions of the user and which generates the feedbacks in response to the instructions and - an output module , from which these feedbacks can be issued to the user , with the input module and the output module of the Master-Dialog Systems being designed in such a way to enable the communication with a terminal device of the user by means of a first program, with which the user can also communicate with other users , this being characterized in that the Master-Dialog System has been designed to be able to communicate via different addresses with user terminal devices , with a functionality of the Master-Dialog System's interpretation module being dependent on the address used. <EOS>