We read peoples’ true feelings in 3 ways:
Language ( the words spoken)
Intonation (How you have said it)
Non-verbal signs (Body language)
Body language is deemed the most important to think about when ensuring you are communicating effectively, followed by tone of voice and language.
Your body language should be relaxed and giving someone their personal space, tone of voice should be low and calm. Language should be key words, not jargon which may be hard to understand.