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

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
Answer: (A) User

Sentence1: No that's all. Thanks. Bye! Sentence2: Yes, that's right. Which of the 12 options would you recommend? Sentence3: Yes, would you try 2 nights instead, please? Sentence4: That's great. Please make a reservation for 1 on Monday. I'd like to stay 3 nights. Sentence5: Your booking was unsuccessful. Would you like another day or a shorter stay. Sentence6: Are they expensive? I would like something nice. And do they have free parking? Sentence7: Please check for something expensive first. If you don't see one, then we can come back to that. Sentence8: Booking was successful. Reference number is : JAKCI7JO . Is there anything else we can help you with today? Sentence9: How about Archway House? It's at 52 Gilbert Road cb43pe, and the phone number is 01223575314. Would that work for you? Sentence10: Yeah, that's fine. Oh, and I need free parking! Sentence11: There is the Acorn Guesthouse that is located in the north side of town. Would you like me to make a booking? Sentence12: I hope you have a great rest of the day. Sentence13: Can you tell me about a nice guest house in your city? I don't care how much it costs. Sentence14: They're a moderate guesthouse with free wifi and parking. Would you like to book a room? Sentence15: So to clarify, you need a guesthouse with free parking, and a moderate price range is acceptable? If so, I have 12 different options for you. Sentence16: It looks like all of the places in the expensive price range are hotels rather than guesthouses. Would you like to consider a different price range? Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: If that is all you need assistance with I thank you for using our service. Have a great day! Sentence2: I am all set. Thanks! Sentence3: Thank you for your help. Sentence4: The police department is 01223358966 Sentence5: Would you like to make a reservation at Curry Prince? If so, for how many and when? Sentence6: I have a train that leaves at 06:09 and arrives at 07:54. Would you like me make a reservation? Sentence7: I've found four in that area. Curry prince and Rajmahal are moderately priced. Pipasha restaurant and Sitar Tandoori are more expensive. Do any of these sound good to you? Sentence8: I am leaving on Sunday and I want to arrive in cambridge by 8:45. Sentence9: I just need one ticket, please. Sentence10: Your booking was successful, the total fee is 30.24 GBP payable at the station . Your Reference number is : PFLVZ20N . Is there anything else I can help with? Sentence11: I am looking for a place to dine in the east part of Cambridge that serves indian food. Sentence12: Great your reference number is 63U62R15 Sentence13: I need a reservation for 7 people on Sunday at 11:30 please and can you give me the reference number? Sentence14: Thank you for the information Sentence15: No that will be all. Thanks for your help! Sentence16: You should go to the local police department? Sentence17: Yes, and give me the train id, please. Sentence18: Curry Prince sounds good. Thank you. Sentence19: The train ID is TR0466, how many tickets do you need? Sentence20: Is there anything else I can help you with today? Sentence21: Thanks! I also need a train departing from leicester and arriving by 8:45. Sentence22: I need to report a crime. Sentence23: Thank you, enjoy. Sentence24: I can help you with that, what day would you like to travel? Question: Who has spoken the sentence 20? (A) User (B) System
Answer: (A) User