Within the communicative language teaching approach, current instructional materials often lack explicit guidance or fail to provide L2 learners with a wide range of resources in the target language. Conversation analysis (CA), which focuses on authentic talk, has been proposed as a potential resource for language classrooms. This study examines the effectiveness of using CA as a pedagogical approach in an EFL classroom and its impact on learners' attitudes toward English language learning. The study engaged eight adult learners in a structured program, encompassing a pre-test, a 4-week explicit CA-informed instruction, and a post-test. After four weeks, learners demonstrated progress in their knowledge and skills of interaction, different aspects of English speaking, interactional competence, and confidence in speaking English. Additionally, the CA-informed instruction positively influenced learners' attitudes toward English language learning and their appreciation of interactional features. The results strongly suggest that language teachers should consider incorporating CA insights into their teaching practices to enhance both linguistic and attitudinal outcomes.