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The article explores some of the complex relationships in oral interactions between the co-construction of social activities (stakes, aims, motivations, etc.) and the mechanics of textualization (dialogism, thematic continuity, sequential heterogeneity, etc.). Conceptual constructs of action theory, transposed to the analysis of an empirical example taken from a body of service transactions, specify under what conditions the description of the organization of discourse might take stock of its praxeological dimension. The article shows that the dichotomies at the basis of borrowings from the conceptual field of action (represented vs. mediated actions, planned vs. situated actions, action vs. textualization) do not always permit grasping the processes connected to the organization of language activities in all their complexity.