What can you do to let Dragons see Humans as caretakers?

Well, seeing as dragons are loyal to a bargin, carnivores, and just flat-out large( an adult could swallow a small school classroom without any trouble) there are two very "I dont think they will work but its worth a shot" answers, here they are. A: bargin. Give it something that has a magical essence to it B:try to gain its trust by giving it gifts and telling it your history. and for whoever this is for, good luck!( youll need it!)