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: No, that's all I need. Thank you! Sentence2: Yes, I would like to book. Can you get me a room there for Sunday? I will need a room for 8 for 5 nights. Sentence3: Any price range is fine. But if you can see if there is one that has 4 stars? Sentence4: Yes, it does have free internet. Would you like to book? Sentence5: I have successfully booked your room. The reference number is UUF3948J . Can I be of further assistance? Sentence6: You're quite welcome, thank you and goodbye! Sentence7: Are there any places in the north that have free parking? Sentence8: There are five places that have parking. What price range do you want? Sentence9: The Acorn Guest House is a moderately-priced 4-star hotel in the north area and has parking. Does this sound acceptable to you? Sentence10: Does The Acorn Guest House have internet? I don't need free wifi. Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System