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

[Q]: Sentence1: No thank you. I do need help finding places to go in town. I'm looking for entertainment in the centre of town. Sentence2: The Alexander bed and breakfast is located in the centre. The phone number is 01223525725. Sentence3: Okay! Just to clarify, from where will you be departing? Sentence4: the address is 56 saint barnabas road Sentence5: what's their address? Sentence6: There are several available. Do you have a preference on if there is a fee or free? Sentence7: I dont see any entertainment in the center of town. Could I try a different area for you? Sentence8: I'd like to stay in a good part of town. Can you please give me the phone number? Sentence9: Okay, how about 2 stars? It does need to include free parking. Sentence10: Great! I have booked a taxi for you. The car will be a yellow audi, and the contact number is 07663388074. Can I help with anything else? Sentence11: ashley hotel is a nice 2 star hotel. Sentence12: Okay, christ's college is free admission. Sentence13: How about a college instead? Sentence14: There are actually no 1-star accommodations anywhere in Cambridge. Sentence15: It is a guesthouse. Want me to book it? Sentence16: Free would be preferable. I also need a taxi. Sentence17: I need a place to stay in Cambridge. It should be either a hotel or guesthouse with 1 star and moderate price range. Can you help me with that? Sentence18: What hotel type is that? Sentence19: I would also like to book a taxi to and from the hotel that leaves by 13:30. Sentence20: I am so sorry. I don't know where my head has been. I need to leave the hotel by 13:30, going to Christ's College. Sentence21: At 4 stars you have many options. What part of town would you like to stay in? Sentence22: you have been of great help thank you Sentence23: How about a hotel with 4 stars instead? Sentence24: I am glad. thanks you too. Question: Who has spoken the sentence 23? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: No I don't. Pick any of the 33 and give me the address and area, please. Sentence2: I have 33 entries that match your request. Do you have a star rating preference? Sentence3: Yes, what time does that train leave? Sentence4: The alexander bed and breakfast is a cheap 4-star guesthouse in the center, how does that sound? Sentence5: I don't need any specific area, just need a guesthouse that is cheap and includes free parking. Sentence6: Perfect. Thank you. That's all the information I need for Cambridge. You have been a great help! Sentence7: I need to find a Train leaving on Friday from London Liverpool Street and arriving in Cambridge. Sentence8: The TR5015 will get you there by 15:07. Would you like me to book you some seats? Sentence9: I have 10 trains as options. Do you have a time you want to leave or arrive by? Sentence10: Can you tell me what area it's in? And can you give me an address? Sentence11: Please book it for me.I also need a place to stay,a guesthouse with free parking ? Sentence12: The travel time is 88 minutes. Can I help you with anything else? Sentence13: Yes I'd like to arrive in Cambridge by 15:15. Sentence14: We hope you enjoy your stay. Goodbye. Sentence15: No thank you, may I please get the travel time of TR5015? Sentence16: Sure. What area would you like to stay in? Sentence17: Alexander bed and breakfast in found in the center of the town. Their address is 56 saint barnabas road. Sentence18: Thank you, I'm also looking for a place to stay. Can you help me find someplace? Sentence19: It would depart at 13:39 and arrive in Cambridge at 15:07. Sentence20: I have booked the train for you. The reference number is JN7FFTTY . Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Your booking was successful. Your reference number is 1RIY72MY . Sentence2: great, that's all i need thanks Sentence3: I have 3 options available with free wifi in the centre of town. What is the price you are looking for? I have expensive to moderate available. Sentence4: friday if possible. let me get reference number Sentence5: Not even in the centre of town? Sentence6: Yes, that would be great. I'll need it for Friday, 3 nights, and 3 people, please? Sentence7: Sure. The address and phone number for La Mimosa is Thompsons Lane Fen Ditton/01223362525 and for Shiraz restaurant it is 84 Regent Street City Centre/01223307581. Sentence8: You're very welcome. Will you be needing a taxi? Sentence9: If you need any further assistance, please contact us. Sentence10: No but what is the address and phone number? Sentence11: The University Arms Hotel is in the centre and expensive, with WiFi. Would you like me to book that for you? Sentence12: Same price range as the restaurant please. Sentence13: Thanks. I also need to get a hotel with free wifi. Sentence14: No, my friends have a car. Sentence15: Which days would you like to stay? Sentence16: Sure, let's try Mediterranean, please? Sentence17: Sorry, not even in Centre. Is there a different type of cuisine you would like to try? Sentence18: No, I'm sorry there aren't any. Sentence19: shiraz restaurant and la mimosa are both in the center and seem to match your needs. Do you need a reservation? Sentence20: Can you let me know if Cambridge has any restaurants that serve Australian cuisine and are priced expensively? Question: Who has spoken the sentence 12? (A) User (B) System
[A]:
Answer: (A) User