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

Q: Sentence1: Booking was successful for Tuesday. Your Reference number is : 0J3V1091 . Sentence2: I'm sorry that doesn't seem to be available would you like me to try a different day or guesthouse? Sentence3: I'm sorry, there does not seem to be a historical site or hiking area in Cambridge. Is there anything else I can help with? Sentence4: Sure, I can help you with that. What section of town were you looking for? Sentence5: Doesn't really matter if they offer either of those or not. I just want it to be a 0 star hotel. Sentence6: Then the city centre north b and b is what you want, shall I book you? Sentence7: i don't really care about the area. Sentence8: I want to see local sights, can you help? Sentence9: I like hiking and seeing historical sites. Sentence10: Okay. Are you interested in hotels that offer internet and/or parking? Sentence11: Yes, I would like to find a hotel in the cheap price range? Sentence12: Yes, a guesthouse is fine. I was looking for zero stars and in the cheap price range. Sentence13: Great, thanks. I don't need anymore help. Goodbye! Sentence14: Yes, please book it for me. Sentence15: I'm sorry, I seem to be having an error in my system. You want a booking at the citycentre north B&B for 6 people, 5 nights, on Monday? Sentence16: I'm also looking for somewhere to go. Perhaps the college. Can you tell me the postcode for the college? Sentence17: City Cenrtree North and B is a cheap hotel,would you like me to book it for you ? Sentence18: Let book the same but on Tuesday instead. Sentence19: I'm happy I could help today. Goodbye! Sentence20: There are 18 colleges in town. I recommend christ's college in the centre. The postcode is cb23bu. Sentence21: Yes, there is a wide variety, do you have an activity type that your are interested in? Sentence22: Yes please, 6 people for 5 nights and we would be arriving Monday. Question: Who has spoken the sentence 21? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: Thank you very much for your help. Sentence2: How about a 2 star rating in the moderate price? Sentence3: Great. Is there anything else I can help you with today? Sentence4: You have a room at the Ashley, reference number 1IIKBZBL . Sentence5: How about some restaurant suggestions within walking distance of the hotel. Any indian cuisine or african cuisine that's expensive? Sentence6: Sweet! Can I also get some information on hotels? Sentence7: Sorry about that, I can look for a restaurant later. That's actually all I need today, thank you! Sentence8: I show 79 of them, is there a certain area of town you prefer? Sentence9: how about broughton house gallery? Sentence10: Of course, ashley hotel and lovell lodge both meet that criteria. Would you like to book with one of them? Sentence11: Ok great! Thank you for reaching out to Cambridge TownInfo centre, I hope you enjoy your stay! Goodbye! Sentence12: Does it have free wife and parking? Sentence13: Surprise me! I'd like the address, fee and postcode. Sentence14: Sure. I have 33 hotels in my database. Can you please provide me with the area, price range, and features you are looking for? Sentence15: Either one is fine, I need to book for 1 starting sunday, 4 nights. Sentence16: the broughton house gallery is located on 98 king street, is free to enter, and the post code is cb11ln. Sentence17: I am looking for places to go. Can you tell me about some museums? Sentence18: No, it doesn't. Sorry about that. Question: Who has spoken the sentence 1? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: Ok. Take care have a nice day. Sentence2: Well, I am here to help, but I need to know what you want me to look for. Sentence3: Okay, how about ugly duckling? Sentence4: Your reservation is all set. Your reference number is 3FF42HU1 . Is there anything else I can help you with? Sentence5: I found 9 great choices. Is there a specific area of town you want to be in? Sentence6: Great. Can you book for five people and give me the reference number for that? Sentence7: There is a 13:21 that would get you there by 15:06. How does that sound? Sentence8: I have that booked for you with a reference number of 1XMFVN8T . Is there anything else I can do for you to make your trip as easy as possible? Sentence9: The train should leave after 13:15 and should leave on saturday. The train should depart from cambridge and should go to leicester. book for same number of people Sentence10: That sounds great. Can you book a table for 5 at 13:15? Sentence11: I am planning a trip in Cambridge Sentence12: Pardon my mistake, my migranes make my head a little foggy at times, can you help me find an expensive chinese place to eat at? Sentence13: It doesn't matter. I trust your judgment. I need a reservation for friday. Sentence14: That's all I needed today. Thanks for your help. Goodbye! Question: Who has spoken the sentence 5? (A) User (B) System

A:
Answer: (B) System
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