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

[Q]: Sentence1: Does it have four stars? Sentence2: Not yet, but can you tell me what time the train arrives in Ely please? Sentence3: acorn guest house is located in 154 chesterton road should i book it for you? Sentence4: I would like to leave on Tuesday after 18:00. Sentence5: It arrives by 20:07! Anything else love? Sentence6: TR5511 leaves Cambridge for Ely at 20.07. Do you need tickets? Sentence7: I've booked your stay at the Acorn Guest House, and your reference number is IT07BRTC . Sentence8: The trip will last 17 minutes. Is there anything else you would like to know? Sentence9: Do you know what day or time you want to leave? Sentence10: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence11: I need some lodging accommodations. It needs to have free parking and Internet please! Sentence12: I would like someone to book me a place with free parking and internet. Sentence13: That should do it. Thanks so much for your help! Sentence14: I found 29 hotels matching your request. What price range and area of town would you prefer? Sentence15: Thanks a lot. Can you also help me find a train going to Ely? Sentence16: Yes. Please book it for 2 people for 4 nights starting Friday. Sentence17: Yes it does. Shall I book? Sentence18: What is the total travel time on that time? Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Phone is 01223505015 and postcode cb11ln. Would you like me to get you a table? Sentence2: No that's all. Thanks so much! Sentence3: I booked you on TR8399 arriving at 10:07. Booking was successful, the total fee is 17.6 GBP payable at the station . Reference number is : AVBKNMXQ . Sentence4: Thank you very much. Sentence5: I'm looking for an expensive restaurant that serves european food while I'm in Cambridge. Sentence6: Darry's Cookhouse and Wine Shop is located at 40270 King Street at the City Centre. Would you like their phone number? Sentence7: Yes, please, and their postcode as well. Sentence8: You are welcome. Enjoy your stay. Sentence9: No. But I need a train going to Ely. Sentence10: Where are you travelling from and what time? Sentence11: I am departing from cambridge on monday and I need to arrive to Ely by 11:15. Sentence12: You choose one please. I need it for 4 people. Sentence13: Is there anything else I can help you with? Sentence14: I have 3 trains available leaving at 06:07, 08:07, and 10:07. What time would you like to leave? Question: Who has spoken the sentence 6? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: I am leaving from Norwich Sentence2: thats all i need thanks Sentence3: We have 18 colleges in town. Did you have an area or entrance fee in mind? Sentence4: Where are you leaving from? Sentence5: I need a trip going to Cambridge and arrive by 11:00 Sentence6: There are five entries meeting your specifications! They leave every hour starting at 05:16 to 09:16. Which would you like? Sentence7: 8 tickets are booked for TR4134 Norwich to Cambridge. Departing 9:16 arriving 10:35. Total fee is 140.8 GB payable at the station. Reference #X1F43YH3 . Anything else? Sentence8: Of course, I will be traveling on Tuesday. Sentence9: Christ's College is widely praised. Their postcode is cb23bu. Can I help with anything else today? Sentence10: We have many trains that meet that criteria. Can you tell me what day you are looking to travel on? Sentence11: I am also looking for any colleges in town. Can you name me any? Sentence12: Nah, not really. Can you just give me the postcode for your favorite one? Sentence13: Please pick one and book it for 8 people. Sentence14: The pleasure was all mine, have a great day! Question: Who has spoken the sentence 8? (A) User (B) System
[A]:
Answer: (A) User