The phrase "conscientious people" refers to individuals who are responsible, attentive to detail, and take their obligations seriously. Full definition
Not surprisingly, the more conscientious the person who buys for a family is, the less likely he or she is to buy soda pop, cookies, or crackers. (bonappetit.com)
They need to be caring, conscientious people with good organizational skills. (medicalassistants.net)
In fact, he is probably the most conscientious person on our team. (thingtrunk.com)