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

[Q]: Sentence1: Yes, after 8:30 would be best. Sentence2: I have booked you a train ride on TR6488 which will depart at 09:21 and will arrive at 10:10. The total fee will be 10:24GBP. Would you like the reference number? Sentence3: No thank you. Thanks for your help. Sentence4: Great, thank you. That's all I needed. Sentence5: What is the total travel time? Sentence6: The post code is cb21ab and the phone number is 01223323737. Where would you like to book a train to? Sentence7: Where are you departing from? Sentence8: I would like the post code and phone number for the restaurant please, and I would like to book a train. Sentence9: The total travel time will be 49 minutes. Sentence10: You're welcome. Is there anything else I can do for you today? Sentence11: I'm leaving from Cambridge. Sentence12: I think something cheap. If not, go up to moderate. Sentence13: Do you have a time in mind? Sentence14: Good day to you. Sentence15: I suggest pizza hut city centre, it has a cheap price range. Would you like me to book it or would you like more information? Sentence16: Yes, Please book the reservation. Sentence17: I need to go to Stevenage on Sunday. Sentence18: I'd be happy to book a table for you. Please let me know the day, time, and the number of people in your party. Sentence19: There are nine of them. What price range do you prefer? Sentence20: I am looking for an Italian restaurant located in the centre of Cambridge. Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: That is all, thank you, goodbye. Sentence2: Is there anything else we can help you with? Sentence3: Goodbye. Sentence4: Ok. Thanks. Sentence5: I am looking for a restaurant in the south part of town and serving portuguese food. What is the address and phone number? Sentence6: Nandos is a portuguese restaurant in the south part of town. Their address is Cambridge Leisure Park Clifton Way and their phone number is 01223 327908 Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: There are 3 chinese restaurants, I recommend the jinling noodle bar. Would you like me to book it for you? Sentence2: Thank you . I also am looking for places to go in town. Can you help me? Sentence3: How about the castle galleries? They are located at unit su43, grande arcade, saint andrews street. Phone number is 01223307402. Admission is free. Sentence4: There are several. Did you have a price range in mind? Sentence5: That sounds great, thanks! That's all I need today. Sentence6: There are 44 great places to visit if you would like to stay near the centre of town. Would you like a museum, architecture, college or just any suggestion? Sentence7: I'd like to find a Chinese restaurant in the center of town. Sentence8: No, not right now but can you provide me with an address and postcode for whichever of those restaurants you would recommend? Sentence9: I would like to visit a nice museum. Please give me the address, entrance fee and phone number. Sentence10: Yeah, no problem happy to help. Sentence11: the restaurant jinling noodle bar the address is 11 Peas Hill City Centre and postal code is cb23pp Sentence12: Yes, moderately priced, please. Question: Who has spoken the sentence 11? (A) User (B) System
[A]:
Answer: (B) System