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 prefer the north please. Sentence2: I have found 13 of them. Can you please be more specific about what you would like? Sentence3: I'd like to find a college to visit in the center of town. Sentence4: No thank you that will be all Sentence5: I would suggest the acorn guest house it is a great place to stay. Sentence6: That will be fine. I'll need to book for Saturday, 3 nights, and 1 person. Sentence7: You're all set! Your reference number is 41BK9PC7 . Sentence8: moderate price range thank you Sentence9: There are 32 hotels that offer free internet, is there a price range or area you prefer? Sentence10: Actually one more thin, I need a taxi from the hotel to the restaurant, I want to leave at 09:45. Sentence11: Thank you! Can you also help me find a place to stay with free wifi? Sentence12: I narrowed it down to 17. What part of town would you prefer and do you want free parking? Sentence13: No that will be it for today. Sentence14: I recommend Emmanuel college. Their address is saint andrew's street Sentence15: Okay, I booked a yellow honda and their contact number is 07225232221. Do you need help with anything else? Sentence16: You can choose one for me and give me the address. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: You're welcome, enjoy your day. Sentence2: How about Downing College? It has free admission and is located on Regent Street/ Sentence3: I'd like to visit a college in the center of town. Could you help me find something interesting? Sentence4: That sounds great! Can I have their phone number and postcode, please? Sentence5: No, that was all I needed to know. Thank you, you've been very helpful. Sentence6: Downing College's phone is 01223334860 and their postcode is cb21dq. Can I help you with anything else today? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I would like a gastropub in the expensive price range. Sentence2: Sure thing. I have TR1997 leaving Leicester on Tuesday at 14:21. Should arrive by 16:06. Would that work for you? Otherwise, I have later options. Sentence3: Your reservation of 5 tickets on the TR1997 train was successful. Your Reference number is : 8PT9BIRG . Sentence4: We have many restaurant options in the centre area. Is there a particular type of food you would like? Sentence5: would recommend the slug and lettuce, they are a very good gastropub, would you like me to book you? Sentence6: Wonderful, that's everything I needed. Thanks so much. Sentence7: Hi, do you have any trains headed to Leicester from cambridge? Sentence8: Okay I was able to do that for you and your reference number is M0YQSBT7 . Sentence9: We do. What day will you be travelling? Sentence10: Thank you! I'm also looking for a great place to eat in the centre. Sentence11: My pleasure. We're here any time you need us. Thank you for using the Cambridge TownInfo centre. Have a great day. Sentence12: That would work for me, I need 5 tickets please. Sentence13: Yes, please. I'd like to book for the same group of people on the same day at 10:30, if possible. Sentence14: I'll be leaving on Tuesday after 13:30. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System