When it comes to having a private conversation with another person, there are several synonyms you can use to describe a one on one talk. Some alternative phrases include a private chat, personal discussion, intimate conversation, heart-to-heart talk, tête-à-tête, quiet conversation, and confidential discussion. Each of these phrases conveys the same meaning of having a conversation with someone in a private and personal setting. Depending on the context and the tone you want to set, you can use any of these synonyms to describe a one on one talk and add variety and nuance to your language.