interlocutor

詳細解釋：

in.ter.loc.u.tor

n.（名詞）
Someone who takes part in a conversation, often formally or officially.
對話者：參加談話的人，通常是正式地或官方地
The performer in a minstrel show who is placed midway between the end men and engages in banter with them.
問話者：在滑稽說唱表演中，站在滑稽插話演員中間與他們戲謔的演員