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

[Q]: Sentence1: That should do. I am also looking for a place to dine. The restaurant should serve Chinese food and should be in the expensive price range Sentence2: Can you help me find an interesting place to visit on the east side of town? Sentence3: Sure do, know of any interesting ones on the east side? Sentence4: Yes, I would like it to be in the east. Sentence5: That is all, thank you! Sentence6: cb13ef. Anything else? Sentence7: I can. Do you like museums? Sentence8: The Yu Garden has fabulous food. Can I book a table there for you? Sentence9: I have many choices. Do you have an area preference? Sentence10: I'm sorry, could I get the postcode to Cambridge Artworks? Sentence11: I'm sorry I have to go now! Bye! Sentence12: Absolutely. You can reach Yu Garden at 01223248882. Is there anything else I can help with today? Sentence13: I also need to get the phone number for the restaurant. Sentence14: Okay great. Glad I could be of help. Sentence15: We have the Cambridge Artworks, the Cambridge Museum of Technology, and several galleries. Sentence16: Thanks for contacting the Cambridge TownInfo Centre and have a great day! Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Enjoy your travels! Let us know if we can be of any further assistance. Sentence2: TR8143 departs at 14:11 and arrives in Cambridge by 14:58, does this suit your needs? Sentence3: I need a train leaving from kings lynn. Sentence4: Yes, I'd like to travel on Wednesday, and I'd like to arrive in Cambridge no later than 15:30. Sentence5: There are no nightclubs in the west. Would you like to try another area? Sentence6: There are 133 trains leaving Kings Lynn, do you have a particular day you are traveling? Sentence7: They have free entrance. Their postcode is cb30ds. Sentence8: Could you look up a college instead then? Sentence9: I'm glad I could help. Sentence10: Churchill college is located in the west part of town. Sentence11: Yes it does. Can you verify the total travel time and price? Sentence12: Thank you goodbye. Sentence13: Thanks a lot, that's all. Sentence14: Sure - the travel time is 47 minutes, and the fee is 9.80GBP per ticket. Sentence15: I also need a nightclub in the west. Sentence16: Could you get me the postcode and entrance fee for there? Question: Who has spoken the sentence 9? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: What day will you be traveling on and what is your departure city? Sentence2: I'm looking for a hotel in the north to stay in. Can you help me? Sentence3: I do need a train from london liverpool street on tuesday please. Sentence4: Okay. Thank you for all your help. Sentence5: All booked. Your reference number is TPJE3LTQ . Is there anything else I can help you with? Sentence6: Yes please book one for 6 people and 4 nights starting from tuesday. Can I please have the reference number? Thank you for your help. Sentence7: I will book that for you now. Sentence8: Are you sure you want to book now, if so, how many people? Sentence9: The booking was successful. Reference number is MO0RU0NN . What else can I help you with? Sentence10: We have 2 hotels in the north. Both are in the moderate price range. Sentence11: Your welcome, have a good day. Sentence12: Yes, they both do. Do you want to book one? Sentence13: There are 5 leaving after 15:15. The first one is leaving at 15:39 and takes 88 minutes. You'd arrive by 17:07 and the cost is 16.60 pounds. Sentence14: Please book for 6 people. Sentence15: Your booking was successful. Can I help you with anything else like restaurants or attractions in the area? Sentence16: I need to depart from london liverpool street, after 15:15. Can you tell me how long the travel time is too? Sentence17: I'd like to book the previously mentioned train that leaves 15:39. Sentence18: The train ride time is 88 minutes. Would you like me to book that for you? Sentence19: Can I look up anything else for you? Sentence20: No thanks, group is still deciding on a carpool or a train, but thank you for all of the help. Sentence21: Great! Do either one have a 2 star rating? Sentence22: It needs to be on Tuesday. Sentence23: on which day do you want to travel? Sentence24: I need a train to Cambridge. Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User