I don't know if it is accurate to say that someone greeted George and Lennie at the bunk house. In section two of the novella, when George and Lennie finally get to the bunk house, an old man is there to talk to George and Lennie. However, no greetings are given. Instead, the old man says that the boss is angry that they did not come earlier. After that there is an altercation between the men. Later we find out that this man is Candy. Let me give you the first words.
“The boss was expectin’ you last night,” the old man said. “He was sore as hell when you wasn’t here to go out this morning.” He pointed with his right arm, and out of the sleeve came a round stick-like wrist, but no hand. “You can have them two beds there,” he said, indicating two bunks near the stove.
After this initial dialogue, George and Lennie meet the boss and the other men, Slim and Carlson. The boss grills George and Lennie and says that he will be keeping his eyes on them. He does not like the fact that George speaks for Lennie.
This sections ends with the George and Lennie settling down in the bunk house and getting to work.