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

Sentence1: We have three places that serve international cuisine that you should like. Do you prefer East or Centre? Sentence2: Yes, that would be great. Can you book a table for 4 people at 11:30 on Sunday? Thanks Sentence3: Can you help me find a corsica restaurant? Sentence4: I also need a train that will arrive by 18:15. Sentence5: TR7786 can have you there by 17:51. It costs 23.60 pounds. Sentence6: Sure, which stations are you traveling between? Sentence7: Then can you find me one that serves international food? Sentence8: The Centre is fine. I need a table for brunch on Sunday. Sentence9: I was able to book your party of 4 into Bloomsbury Restaurant on Sunday at 11:30 , Reference: 4ni28yk5 . Can I assist you further today? Sentence10: There is no restaurant serving corsica food in the town. What is another type of food you would like me to search for? Sentence11: What is the travel time? Sentence12: Goodbye, enjoy the rest of your day! Sentence13: The trip takes 51 minutes. Would you like me to book that train for you? Sentence14: I recommend the Bloomsbury Restaurant. It's located at Crowne Plaza Hotel, 20 Downing Street. It's a moderately priced restaurant. Can I book this for you? Sentence15: not now. that is all i needed. have a good day Sentence16: I'll be leaving Cambridge on Monday and I'd like to arrive to London Kings Cross by 18:15. Is there anything available? What time will it leave? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System

Sentence1: Thank you for using the Cambridge Town Info Centre Services. I hope you enjoy your time in Cambridge! Sentence2: is it in moderate price range? Sentence3: Do you have anything in the moderate price range? Sentence4: Most of our nightclubs are right in the center of town. Kambar is my favorite. Sentence5: No, thanks. Can you find a gastropub restaurant in the centre, please? Sentence6: it is an expensive gastropub Sentence7: Yes, there's the the cow pizza kitchen and bar. Sentence8: They're located on Corn Exchange Street. Would you like me to make a reservation for you? Sentence9: Awesome! Can you provide me with the address, entrance fee, and postcode, please? Sentence10: The address is 1 wheeler street cb23qb and admission is 5 pounds, would you like their phone number? Sentence11: I am looking for something fun to do while in town. A nightclub would be nice. Sentence12: What is their address? Sentence13: backstreet bistro is an expensive gastropub in the centre area. Would you like more information? Sentence14: No, I just need information for today. You have answered all of my questions. Thanks so much. Bye. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System

Sentence1: I have no hotels in this area, only guesthouses. Would that work? Sentence2: I am looking for information in Cambridge Sentence3: Okay. Your booking was successful! The reference number is ZWH6Y40Y . Can I help with anything else today? Sentence4: If you take the train departing Ely at 19:35 you will arrive by 19:52, and the cost is 4.40. Sentence5: that's fine, can you book one? Sentence6: What type of information can I help you with? Sentence7: Well, price should be in the moderate but i do want a 4 star hotel. Sentence8: We have quite a few to choose from. Do you have a preference in price range or the area of town? Sentence9: Thank you for choosing help desk. Have a wonderful day. Sentence10: I would recommend avalon, which is a 4 star guesthouse in the north. Will that work for you? Sentence11: The earliest train that days leaves at 19:35 will this work? Sentence12: Yes that works. What is the arrival time and price please? Sentence13: That was all I needed. Sentence14: Yeah, that will be fine. It will need to be on the same day for 3 nights and 3 people. Sentence15: Thanks! I'm also looking for a 4-star accommodation with free wifi. Sentence16: I'll be leaving from Ely on Tuesday after 17:45. Are there any trains available then? Question: Who has spoken the sentence 12? (A) User (B) System

Answer: (A) User