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

Q: Sentence1: If you can go ahead and recommend one and provide me with the phone number and address please. Thanks so much. Sentence2: I would like to book a train to Leicester that leaves on Saturday. Sentence3: That's all for today. Thank you for your help! Sentence4: Would you like to book a seat on TR1832? It will leave at 15:21 and arrive at 17:06, 105 minutes later. It will cost 30.24 pounds. Sentence5: sure, there are several in that area. including art galleries and history museums. Sentence6: Yes, do you have a certain time you'd like to leave or arrive by? Sentence7: broughton house gallery is located at 98 King Street and their phone number is 01223314960. Do you need anything else? Sentence8: Thank you for calling today. Sentence9: I'd like to leave after 15:15 please. Sentence10: In the centre, please Sentence11: Booking was successful, the total fee is 30.24 GBP payable at the station. Your reference number is VHWYUF80 Sentence12: What area are you interested in? Sentence13: i also want to check out some museums while i'm in town. Sentence14: Yes, can you please book that for me and send me a reference number. Thank you Question: Who has spoken the sentence 12? (A) User (B) System

A: Answer: (A) User
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Q: Sentence1: What area would you like to stay in? Sentence2: I need it for 7 people. 5 nights starting Sunday. Sentence3: Which of the 2 hotels should I book for you? Sentence4: Are there any amenities that you are looking for? Parking? Internet? Sentence5: TR2021 is leaving at 20:24 would that work for you? Sentence6: I don't really have a preference for area. But I would like it to be a hotel rather than a guesthouse. And I would love free parking. Sentence7: I'd like free parking. Sentence8: How about the Ashley Hotel? Sentence9: Booking was successful, the total fee is 56.56 GBP payable at the station . Reference number is : EZIAXWCQ . Can I help you with anything else? Sentence10: Great! I'm glad I could be of help. Have a good day. Sentence11: We have ashley hotel and lovell lodge, shall I book you for one of the two? Sentence12: I am also looking for a train departing from stansted airport going to cambridge on sunday. I need to leave after 19:30. Sentence13: I'm looking for a place to stay in Cambridge, moderate price for a hotel. Sentence14: Yes, please make a booking for my group. We'll all be traveling together. Sentence15: Thank you that is all I needed today. Sentence16: Booking was successful. Reference number is L1S8JNAC . Do you need anything else? Question: Who has spoken the sentence 4? (A) User (B) System

A: Answer: (A) User
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Q: Sentence1: i have plenty of trains, can i get more information please? Sentence2: What's the postcode for your favorite one? Sentence3: No, thank you. You've been very helpful! Goodbye. Sentence4: I need to leave on sunday after 12:30 from cambridge to stevenage Sentence5: I've booked two tickets for the TR0523 train, and your reference number is R6GCVVA0 . Can I help you with anything else today? Sentence6: There are 44 different things to do in the centre of Cambridge. Can you help me narrow it down by type of activity or attraction? Sentence7: I also need to book a train. Sentence8: My personal favorite is holy trinity church. They are on market st and the postcode is cb23nz. Anything else I can help you with today? Sentence9: I'm looking for places to go in the centre of Cambridge. Sentence10: Great, can I get two tickets on it, please? Sentence11: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence12: The first train after 12:30 is the TR0523, which leaves Cambridge at 13:21. Question: Who has spoken the sentence 11? (A) User (B) System

A:
Answer: (B) System
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