Courtesy (noun)

1. Politeness and considerate behavior in dealing with others.
2. A polite or considerate action or remark.
3. The act of being attentive and respectful towards others.

Origin:

From middle english curtesie, from old french curtesie, from cortois ("polite, courteous"), from corteis ("courtly"), from cort ("cour.t")

Examples:

1. He opened the door for her as a courtesy.
2. The hotel staff provided excellent courtesy throughout our stay.
3. It is a common courtesy to say please and thank you.
4. The athlete showed good sportsmanship and courtesy towards his opponents.
5. He extended an invitation as a courtesy to his colleague.