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: Address please and thats all. Sentence2: I found 7 hotels that are in the cheap, moderate, and expensive range. What would you prefer? Sentence3: It doesn't matter. Let's go with moderate. Sentence4: They are located at 138 perne road. Sentence5: I am looking for a 4 star guesthouse? Do you have any on the east side with free wifi? Sentence6: Are you looking for a hotel or a guesthouse? Sentence7: Thank you. That's all I need. Sentence8: Okay great. Enjoy your stay in Cambridge. Sentence9: There are 3 entries that meet your requirements. Sentence10: You are booked into the carolina bed and breakfast. Your reference number is WXN8W3MZ . May I help you with anything else? Sentence11: Hi, I'm looking for a place to stay in the east with free wifi. Sentence12: Perfect! Can you make a reservation for me for 3 people, 5 nights starting Tuesday? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User