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

[EX Q]: Sentence1: The hotel should be in the moderate price range and should include free wifi. Sentence2: Booking was successful. Reference number is : WJFFGVWD . Is there anything else I can help you with? Sentence3: I've found several hotels in the moderate price range. Is there a specific area of town you're looking to stay in? Sentence4: How about the Acorn Guesthouse? Free wifi and moderate price range. Sentence5: Sure, book me for 2 people for 5 nights starting on Monday? Sentence6: That will be all. good bye. Sentence7: Yes, I'm looking to stay in the north. Sentence8: I am actually looking for a hotel. Is the Acorn Guesthouse listed in that type? Sentence9: No, it is not. How about Ashley hotel? Sentence10: I'm looking for lodgings that are moderately priced. Sentence11: Good bye, enjoy your stay. Sentence12: I've found 11 possibilities for you. Would you prefer a guest house or a traditional hotel? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Thank you for using our system today! Sentence2: I am coming to cambridge and heard about a bed and breakfast called finches. Sentence3: Yes, I would like to arrive before 5:00 PM. Sentence4: It is a lovely guesthouse on the west end boasting cheap prices and a 4 star rating! Would you like their address or phone number perhaps? Sentence5: I actually would like to book the hotel for 7 people starting on Tuesday for 3 nights. Sentence6: I'll be departing from cambridge and going to norwich. Sentence7: I apologize, I actually need to leave after 16:30 Sentence8: No problem, but I'm afraid there are no trains leaving after 16:30 and arriving by 17:00. Might I suggest TR7047, which leaves Cambridge at 16:36 and arrives in Norwich by 17:55? Sentence9: Is there a time you would like to arrive before? Sentence10: Can you also help me find a train on Fridya? Sentence11: Train TR7747 leaves at 15:36 and arrives in Norwich at 16:55. Would you like me to book you tickets? Sentence12: Thank you, no that will be all. Sentence13: OK, the booking for successful. The total is 17.6 GBP and the reference number is MIMOPEN1 . Is there anything else I can do for you? Sentence14: Yes, that sounds great. Please book that for me. Sentence15: I was able to book your party of 7 at Finches bed and breakfast for 3 nights. Your reference number is 4R76GWVJ . Can I help you with anything more today? Sentence16: Of course. There are many available Friday. Where will you be traveling to and from? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX 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
[EX A]:
Answer: (A) User