Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Their postcode is CB11JG. Sentence2: I'm looking for a place, I believe its official name is "Parkside Police Station". Sentence3: Ok, thank you very much for your help. Sentence4: The Parkside Police Station is located at Parkside, Cambridge and their telephone number is 01223358966. Can I help you with anything else today? Sentence5: What is their postcode? Sentence6: You are most welcome! Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System