Personally, I'd say, "a person who never intentionally ignores others and always acknowledge other's actions or gestures and value them".
We often get these questions on this site, "What is a single word in English that means a tall, blue-eyed man wearing a sweater and riding a bicycle on a Thursday?" Often there is no single word to express a complex idea.
In this case I see several suggestions, but in my humble opinion, none SPECIFICALLY mean the exact combination of character traits you are describing. If you just mean sort of, kind of, in this general direction, then yes, you could say "respectful", "considerate", etc. But if you want that exact meaning, you have to spell it out.