Adjacency pairs divide utterance types into first pair parts and second pair parts to form a pair type. There are many examples of adjacency pairs including Questions-Answers, Offer-Acceptance/Refusal and Compliment-Response.

Sequence expansion

Sequence expansion allows talk which is made up of more than a single adjacency pair to be constructed and understood as performing the same basic action and the various additional elements are as doing interactional work related to the basic action underway.
Sequence expansion is

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