Answer: Caitlyn is demonstrating the maxim of "tact" or "generosity" in the principle of politeness.
Explanation: This maxim states that speakers should be willing to put themselves in the other person's shoes, and understand and acknowledge the other person's needs, wants, and priorities. By understanding the importance of other people's time and offering to help them when necessary, Caitlyn is showing that she is considerate of others and willing to put their needs and wants above her own. This behavior is often seen as a sign of politeness and courtesy, and it's an important aspect of building and maintaining positive social relationships.