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

Sentence1: I'd like to find a 4 star guesthouse, please. Sentence2: The Place is a great nightclub in the south, located at 22 sidney street, post code cb23hg. The phone number is 01223324600. Is there anything else I can help you with? Sentence3: Yes, book it for me please. Thank you. Sentence4: It does not really matter. It will be just me starting on Friday for 3 nights. Sentence5: What attractions do you have in the south? Sentence6: I have found 18 guesthomes that match the criteria you listed. Is there any other specifications you have about the guesthouse (area,price range,etc) that you would like to tell me? Sentence7: Unfortunately, the booking was unsuccessful. Would you like to shorten your stay or try another place to stay? Sentence8: arbury lodge guesthouse is a moderately priced guesthouse in the north. How does that sound? Sentence9: The arbury lodge guesthouse is in the moderate price range. Sentence10: We have 8 types of attractions in the south? What type are you looking for? Sentence11: Sure, is there an area you prefer? Sentence12: I have to have free wifi Sentence13: I would like a room that is close to the nightclub for atleast 1 night up to 3 nights? Sentence14: Hmm, I'm not really sure. Do you happen to have any nightclubs? If not, what are my choices? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: No but I do need a train that will depart from peterborough and should go to cambridge. Sentence2: When would you like to depart or arrive? Sentence3: The ticket price is 16.50 pounds. Would you like me to book that for you? Sentence4: No than kyou. Sentence5: And how much is a ticket? Sentence6: The duration of the train ride is 50 minutes. Sentence7: TR8509 will leave Peterborough at 15:19 and arrive in Cambridge at 16:09. Would you like to book tickets on this train? Sentence8: Ok! Have a great day! Sentence9: Yes, there is. It's located in the centre area and has free admission. Would you like more information about it? Sentence10: Are you sure that there is absolutely nothing else that you need? Sentence11: No, I think I'll hold off on that. That's it for today. Thanks for your help. Have a great day. Sentence12: maybe, what's the duration of the train ride? Sentence13: I need the attraction type and address. Sentence14: I'd like to depart after 15:00 on thursday no preference on arrival. Sentence15: The Scott Polar Museum is a museum located on Lensfield Road. Would you also like their phone number? Sentence16: A friend told me about an attraction called the scott polar museum. Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: I would like chinese food please? Sentence2: Yes I would like to book it for 6 people for 3 nights staring from Thursday and would like a reference number after doing so. Sentence3: I have booked the hotel for you. The reference number is S770N2F9 . What kinds of restaurants are you hoping to try? Sentence4: I have made your reservation for 6 people at 14:00 on Thursday for Charlie Chan. Your reference number is 3QUDNYHJ . Is there anything else I may assist you with? Sentence5: I found several all over town. I can narrow the options down based on what part of town you prefer. Sentence6: book at table for 6 at 14:00 on thursday, please. Sentence7: that sounds good to me. i want you to book it for me Sentence8: I'm coming into town and want to try local restaurants and am looking for a hotel called Bridge Guest House. Do you know where this place is at? Sentence9: I need the reservation for 6 people at 14:00 please. Sentence10: Thank you. That is all I need. Sentence11: I have 10 restaurants available. What price range would you prefer? Sentence12: Okay. I need to know the day, time, and number of people you would like to book a reservation for? Sentence13: I would like to be in the centre Sentence14: A cheap place please. Sentence15: Okay. I've booked a taxi for you. It'll be a yellow lexus and the contact number is 07801886354 Sentence16: Thanks for letting us assist you! Enjoy your visit! Sentence17: What day would you like the restaurant for please? Sentence18: yes it is located in 151 hills road. anything else? Sentence19: how about charlie chan? sounds lovely. Sentence20: Yes I need a taxi leaving the hotel for the restaurant a little before 14:00. Question: Who has spoken the sentence 13? (A) User (B) System

Answer: (B) System