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

[EX 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
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No that will be all! Thank you very much! Sentence2: Done! Your table will be reserved for 15 minutes. Your reference number is 5XFZM2KU . Is there anything else that I can help you with? Sentence3: Sure, they are all expensive though. I love Tandoori Palace located at 68 Histon Road Chesterton. Sentence4: Is there anything else you need? Sentence5: They do not have an entrance fee listed, but you can always call and find out. Sentence6: Thank you for using our services. Have a great day! Sentence7: Okay, thank you for your help! Sentence8: Nevermind - I don't need the taxis after all. Can you help me find a place called tenpin, instead? Sentence9: Can you book a reservation for 8 at 14:45 on Friday? Sentence10: Can you provide me with the telephone number and book two taxi cabs to the restaurant Sentence11: Can you tell me what their entrance fee is? Sentence12: is there anything else i can help you with? Sentence13: Tandoori Palace's phone number is 01223506055. Please give me the taxi departure day and time and I'll be more than happy to book one for you Sentence14: Can you help me find a indian restaurant in the west? Sentence15: Tenpin is an entertainment venue in the south. They are located at Cambridge Leisure Park, Clifton Way. Their postcode is cb17dy. Their phone number is 08715501010. Sentence16: That sounds perfect! Thank you. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Cambridge has many colleges in the center of town. Downing College is nice, and it's free to get in. Sentence2: I'm looking for a proper hotel, please. If it had free wifi, well, I wouldn't complain about that either. Sentence3: The reference number is 75625428 . Anything else? Sentence4: I would like to have the reference number for the room booking please. Sentence5: The address for downing college is regent street. Have a great day. Sentence6: Alright, your room is booked for the Ashley Hotel for 5 nights with 6 people. Is there anything else I can do for you? Sentence7: I have confirmed your taxi a black lexus will be picking you up. Their contact number is 07864379890. Do you need further assistance? Sentence8: I would now like to book a taxi from my hotel at 06:15 going to the college. Sentence9: Actually, can I get the street address of Downing College before we go? Sentence10: The Ashley hotel is in the north and has both free internet and parking. Would you care to go here? Sentence11: I am looking for a hotel in the north to stay in. Can you help me with this? Sentence12: Yes. I want to check out a college in the centre. Sentence13: Yes, I want to book it for 6 people and 5 nights starting from sunday. May I also have the reference number? Sentence14: That sounds great. Can I get the address and postcode? Sentence15: There are 13 hotels in the north. Do you want a guesthouse or a proper hotel? Sentence16: It's in the centre of town and it's at cb21dq. Question: Who has spoken the sentence 8? (A) User (B) System
[EX A]:
Answer: (A) User