Speech function is an utterance that serves a function such as statement, question, offer, and command. As people carry out a casual conversation to exchange goods-and-services and information, they perform speech functions at the same time. This study is to elaborate the negotiation pattern/speech by the user and what extends are the lexicon-grammatical realization. The research is descriptive. The unit of analysis is move. Move is part of the turn, which expresses speech functions. Move, itself, is expressed in language through clause. Clause encodes meanings. One of those meanings is interpersonal meaning. Interpersonal meaning is realized through selections from the system of mood. The high proportion of these propositions that surpasses the frequency of proposals, i.e., the linguistic function in the exchange of goods, occurs because the communicators are strangers, they have never met before; therefore, they try to learn as much as they can from their interlocutors. Pedagogically it implied that language competence is important for people in communication. The language competence for a person can perform how respond to such questions and statements appropriately.