Rashi on II Kings
Do not greet him. Do not inquire about his welfare. All this [was done] to discourage conversation, where one might ask him, “Where are you going?” and he would say, “To revive the dead.” It is not respectful for the miracle when the maker brags about it. But, he did not obey.24Geichazi took his mission very lightly and considered it a joke. He was therefore unsuccessful in his mission. Radak When anyone asked him [where he was going], he responded, “My master sent me to revive the dead.”25Alternatively, Elisha initially thought that the boy had merely fainted and therefore his personal presence would not be necessary.—Malbim