You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Eraina in the west part of town serves expensive european food. Sentence2: Hello, I am looking for an expensive restaurant that serves european food. Sentence3: Great! Can I have their address and phone number? Sentence4: You're welcome. Sentence5: Thank you goodbye. Sentence6: Eraina is located at Free School Lane City Centre, and their phone number is 01223 368786 Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System