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

Example Input: Sentence1: The postcode is CB58BS. Can I help you find anything else? Sentence2: Can you tell me what their star rating is? Sentence3: I need something in the south and free parking. Sentence4: I will be in the centre of cambridge. I am looking for any type of attraction involving architecture. Sentence5: You're very welcome, I'm glad that I could help. I hope that you enjoy your stay! Goodbye. Sentence6: Of course! They are a 3-star establishment. Would you like me to go ahead and book that for you? Sentence7: thats it, thanks! Sentence8: Bridge Guest House was available for 2 nights. Your reference number is ULWMFZAX . What else can I do for you today? Sentence9: I'm sorry. There is no availability. Would you like to try different dates or another hotel? Sentence10: I'd recommend All Saints Church on Jesus Lane. Did you need help with anything else? Sentence11: I would recommend the Bridge Guest House based on your criteria. Would you like me to book you a room? Sentence12: There are 33 places to stay, do you have any requirements? Sentence13: How about just 2 nights instead? Sentence14: yes, 7 people 4 nights starting Wednesday. Sentence15: I need a place to stay. Sentence16: Can you give me the postcode for that? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: 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
Example Output: Answer: (B) System

Example Input: Sentence1: I would be happy to help you find a great attraction to visit! What kind of attraction are you interested in visiting? Sentence2: You're welcome. Sentence3: Great, thanks! I think that's all I needed. Sentence4: I would like to find a nice attraction to visit in the centre of town. Sentence5: I'll be heading to Cambridge, but I can't leave until sometime after 21:15, please. Sentence6: I have no preference. Can you make a recommendation and provide the address, entrance fee, and postcode? Sentence7: The address is 98 King Street and the postcode is cb11ln. What is your destination on Friday? Sentence8: How about the Broughton House Gallery? There is no entrance fee. Sentence9: I managed to book you on that train. The total fee is 9.8 GBP and the reference number is 9M753T1T . Sentence10: There are two trains meeting your needs. The earlier train leaves at 22:11 and the later train at 23:11. The ride takes 47 minutes. Which do you want me to book? Sentence11: Can you get me one ticket on the 22:11 train? Sentence12: whats its postcode and address? i would also like to get a train that leaves friday from kings lynn Question: Who has spoken the sentence 1? (A) User (B) System
Example Output:
Answer: (B) System