谈论理想职业的句型 — 英语阅读题

阅读短文，回答问题。 Dreams of Class 6, Grade 6 Tomorrow our class will have a talk about our dreams. Lily wants to be a doctor because she wants to help sick people. Jack is going to be a pilot, so he can fly planes to many countries. My best friend Peter wants to be a cook. He says, "Nice food can make people happy." I want to be a police officer, because I want to keep people safe. We are all working hard for our dreams! Question: What does the writer's best friend want to be? Why? Please answer with one complete sentence.