<human>:  Why did Achilles kill Hector?
<bot>: Achilles was angry because Hector had slain his friend Patroclus. Achilles was so angry that he wanted to kill Hector, but he didn't want to dishonor his friend's memory. He knew that killing Hector would be a terrible thing, so he decided to trick him into coming to him, so he could kill him.