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

Sentence1: I need the postcode, thanks. Sentence2: That's all the info I needed today, thank you! Sentence3: The post code is CB20QQ, Hilld RD Cambridge phone number 012232455151 Sentence4: I have been hurt in an accident, can you provide the nearest hospital? Sentence5: No problem. Goodbye! Sentence6: The nearest hospital is Addenbrookes Hosipital. Would you like the address and phone number? Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System