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

[Q]: Sentence1: Yes, can I please get the phone number? Sentence2: I would like to commute between Graffiti and Whale of a time. I will be heading to the attraction after eating. Sentence3: Where would you like to be picked up? Sentence4: Can you book it for me and get a reference number ? Sentence5: Just one person, no specific day and time. I'm also looking for a place to go in town in the same area of the restaurant. Sentence6: I have no south african restaurants i the expensive range. Would you like to try another type or price range? Sentence7: In the west area. Sentence8: Can you please recommend one and provide me their phone number? Sentence9: Yes, the phone number is 01954781018. Can I help with any other information today? Sentence10: Is there a certain area you would like? Sentence11: Are there any restaurants serving South African cuisine? Sentence12: Can you book it for me and get a reference number ? Sentence13: What time would you like to leave? Sentence14: There are many colleges and museums but I think you will really enjoy the entertainment called whale of a time. Would you like more information? Sentence15: How about something serving British food? Sentence16: We have more than 100 restaurants all over town. May I ask if you have a certain price range you prefer to stay within? Sentence17: Yes, I in am interested in an expensive restaurant. Thanks! Sentence18: Unfortunately I cannot book the restaurant for you without a day and time. Can you provide that for me please? Sentence19: I have 6 different places that serve British food. They are spread out throughout town. Did you have an area you prefer? Sentence20: Graffiti is a great restaurant in the west area. Would you like me to make reservations for you? Sentence21: Your reference number is 73H253CP . They will hold the table for 15-minutes. How else may I help you? Sentence22: Hi, I am traveling to Cambridge and am excited to see some local tourist attractions. I really need help with a restaurant though. Sentence23: I want to leave the attraction by 7:15. Sentence24: How about Tuesday at 7:30? Sentence25: What day do you wish to dine, at what time and how many people will there be? Sentence26: There are over a dozen different attractions in the west; do you have a particular type of activity in mind? Sentence27: Yes I need an attraction in the same area. Sentence28: Thank you. I am looking for a taxi to commute between the two places. Question: Who has spoken the sentence 13? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: That will work. What is the price and arrival time for that? Sentence2: Where would you like to travel from and to? Sentence3: Sure, I have 7 trains that would work. The closest to your requested time is the TR5110 that leaves at 20:34. Sentence4: That will cost you 16.50 pounds and you will arrive by 21:24. Sentence5: Certainly. Home from Home is a guesthouse on the north end of the city. It offers free internet and parking and is moderately priced. Would you like to book a room? Sentence6: The train should depart from cambridge and travel to peterborough. Sentence7: You too. Goodbye. Sentence8: I would like to book a train that is running on Tuesday and departs anytime after 20:15, can you help me with that? Sentence9: Thank you have a nice day. Sentence10: Your booking was successfull! Reference number is I5VKNKJ3 Sentence11: That is great. I also want to know about a hotel called home from home. Can you find it for me. Sentence12: Yes. I would like to book for 8 people for 3 nights starting from Saturday. Question: Who has spoken the sentence 9? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: No, that will be all. Thank you! Sentence2: I really like the north. It seems much more peaceful. Sentence3: no, could you just reserve a table for 4 at 11:45 thurs and I'll need the ref # too please Sentence4: Hakka and the hotpot are expensive, golden wok is moderately priced, any preferences? Sentence5: Sure, which part of town do you want to stay in? Sentence6: I also would like to find Chinese food in the north. Sentence7: A table has been booked at Hakka. The reference number is WBYI96YH . Is there anything else I can do for you today? Sentence8: No thank you that will be all Sentence9: Either way is fine with me. What's the phone number? Sentence10: I have two hotels available. I'd recommend the Ashley Hotel. Would you like more information? Sentence11: Their phone number is 01223353888 Sentence12: Could you please find me somewhere to stay? I need a moderately priced hotel but I'm not fussy about parking Sentence13: The Acorn Guest House is 4 stars. Does it need to be a hotel or can it be a guesthouse? Sentence14: Is it a 4 star? If so, can you give me the phone number? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User