Mirror your interlocutor's body languageIf you want to make a person like you and make him trust you, mirror his body language, especially his postures and gestures.
Most importantly, move smoothly.For example, when my interlocutor crosses his arms, I wait another 30-60 seconds before repeating after him.
I can tell you with certainty that this trick is indispensable when you need to win over a victim and gain their trust.