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

[EX Q]: Sentence1: I would like a four star hotel, and I don't need free parking. Sentence2: Certainly, there are 44 attraction in the town centre, do you have a type of attraction you would like to visit? Sentence3: I don't have any in particular. What would be the highest rated attraction in that area? Sentence4: There are 32 hotels with free wifi, do you have any other things you require in a hotel? Sentence5: I am looking for places to go in the centre. Sentence6: Sounds great. Can I book 8 people for 2 nights starting Tuesday? Sentence7: there are a total of 79 attractions in Centre what type of attraction that you are looking for? Sentence8: No. That's all I needed. Thanks! Sentence9: Are there any museums available? Sentence10: Could you recommend me a hotel that is cheap? Sentence11: I would recommend the Acorn Guesthouse which is 4 stars, moderately prices and offers both free wifi and parking. Sentence12: I am looking for a hotel with free wifi. Sentence13: That sounds great. Can I get the postcode for Castle Galleries? Sentence14: Hmm, let me see...I think maybe a moderately priced 4 star hotel might be better. Do you show any availabe? Sentence15: Yes the postcode is cb23bj. Is there anything else I can help you with? Sentence16: I don't have rating information, but Castle Galleries in nice, and admission is free. Would that interest you? Sentence17: Great. Thank you for contacting Cambridge Towninfo Centre. Have a great day. Sentence18: How about a and b guest house, unless you have any other specifics. Sentence19: You are all booked at the Acorn Guest House. Your reference number is LXMFRZLR . Do you need assistance with anything else? Sentence20: How about the autumn house? It has 4 stars, is in the cheap price range and has internet. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I have 23 places. What area would you prefer to be in? Sentence2: There is Cafe Jello Gallery in the west, Cambridge Artworks in the east and Broughton House Gallery in the centre. Does any of those sound appealing? Sentence3: Just the price range and postal code please. Sentence4: Cafe jello gallery postcode is cb30af and the entrance is free, is there anything else I can do for you? Sentence5: Here is the address 529 Newmarket Road Fen Ditton. Sentence6: Do you have an attraction type preference? Sentence7: You're welcome! Enjoy your visit! Sentence8: that is it. thank you for helping me Sentence9: Yes, I would like to see a museum. Can you tell me the postcode and entrance fee for it? Sentence10: I have no particular area preference. Can you list a few for me to select from? Sentence11: Yes could I have their postcode and entrance fee? Sentence12: Can you give me more information about Yu Garden. Sentence13: Of course! It is a chinese cuisine restaurant located in the east. Anything else you would like to know? Sentence14: I am traveling to Cambridge and excited about seeing local tourist attractions, can you help? Sentence15: I am also looking for the restaurant Yu Garden. Sentence16: Their price range is expensive and the postcode is cb58pa. Are you sure that is all you needed? Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: There is an error in that train booking could I book the TR2519 from Cambridge to Birmingham New Street, on Friday, departing at 15:01? Sentence2: Yes, that would be great. I'd like to book two tickets and I'll need a reference number, please? Sentence3: Of course. I reserved the table for you. Your reference number is D9XHCFDT . Sentence4: that is all for now, thank you very much. Sentence5: Booking was successful, the total fee is 150.19 GBP payable at the station. Reference number is : LCEXHUAZ . Sentence6: Two tickets please. Sentence7: Thank you for your help. Sentence8: No specific area for the restaurant. Sentence9: Sure, there are a number of expensive options. Did you have a certain part of town in mind? Sentence10: the good luck chinese food takeaway fits those criteria, can I make a booking for you? Sentence11: Where are you coming from? Sentence12: I'm also looking for a chinese restaurant that is semi expensive. I would like it the same day I arrive. Sentence13: I want a train department from Cambridge and going to Birmingham New Street on Friday at 14:45. Sentence14: Do you need me to book transport or provide anymore info? Sentence15: I need a train going to cambridge that leaves after 14:45. Sentence16: I can put you on the tr8842 it leaves at 15:17 how many tickets please Sentence17: Yes, I would like to book it for 2 people at 10:00 please. I'll need it for Friday please. Can I get the reference number please? Sentence18: You're welcome, have a great day! Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System