Modern dialogical speech is undergoing a major transformation due to the use of electronic communication format, which introduces its own changes in the context of communication. Dialogical speech is characterized by a high dependence on the context. In electronically mediated communication, the situation of communication is no longer the same for the communicators: they are in different places, experiencing different stimuli and communication interference, despite the fact that the communicators continue to maintain a dialogue and exchange replicas. Accordingly, the concept of context needs to be supplemented and reinterpreted in connection with the new conditions of its occurrence that is electronic space. The aim of the study is to find the qualitatively essential components for successful mediated communication, which depend on the context of the communication situation. One strategy for achieving successful communication is to remove possible barriers in communication. For this purpose, the detailing of the context of communication, its influence on the effectiveness of communication is carried out, and the concept of semiotic field of dialogue is developed. Under the semiotic field of dialogue we understand the information, which affects the communicants understanding of each other: the references, the presuppositions of the addressee, the presuppositions of the addressor. The material of the study was dialogic communication within the framework of organizational communication. The specific nature of the discourse of corporations and organizations creates its own unique context that is described in the article. The author has identified several groups of interference in the electronic format of dialogical speech, such as physical interference, informational interference, semantic interference and psychological interference.