You can find these dialogues on American English State Gov or download the full set from the Internet Archive .
ZIP files for student book audio (e.g., Files 1-2, 3-4) are available on Oxford University Press . You can find these dialogues on American English
Advanced learners can download ZIPs for "Colloquial English" interviews on Level 4 . You can find these dialogues on American English
Several reputable platforms provide structured conversation courses in ZIP format: You can find these dialogues on American English