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

Input: Consider Input: Sentence1: Hmm. What about museums? Sentence2: Booking completed! Your contact number is 07349924614. The car type is a black ford. Can I help you with anything else? Sentence3: I don't care about wifi or parking. To be honest, I don't care what area it is in, either. What would you pick? Sentence4: Cambridge and county folk museum is available, would you like that? Sentence5: Can you tell what time you want to be picked up and at which location? Sentence6: I'm also looking for an attraction preferably on a boat in the west. Sentence7: Sure. That sounds good. Can I get their address and postcode please? Sentence8: Thanks! I also need a taxi between both locations, please. Sentence9: Wow that was fast thanks! No, that is all I needed. Hope you have a wonderful day. Sentence10: Sounds nice. What is the address and postcode please? Sentence11: I want to leave the hotel by 23:15. Sentence12: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence13: I'm looking for a moderately priced guest house. Can you recommend one? Sentence14: There are 15 options. Do you have a specific area you would like to stay in? And are you interested in wifi and parking? Sentence15: I would go with the Acorn Guest House if I were choosing a moderately price guesthouse. Sentence16: Sure their address is 2-3 Castle Street and the postcode is cb30aq Sentence17: The address is 154 Chesterton Rd, the postal code is cb41da, is there anything else that I can assist with? Sentence18: There are no boats in the west, can I try something else for you? Question: Who has spoken the sentence 11? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: 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

Output: Answer: (B) System

Input: Consider Input: Sentence1: There are three: Pizza Hut City Centre, Ask, and Zizzi Cambridge. Would you like to make a reservation at any of these? Sentence2: How many tickets will you be needing? Sentence3: the price is 4.40 pounds Sentence4: I'm trying to plan a trip there. I need to find a cheap restaurant. Sentence5: Just one ticket, please! Sentence6: Before I book anything, what is the price? Sentence7: No, I would like an Italian place in the centre. Sentence8: The price is 4.40 pounds. Sentence9: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence10: The TR4447 leaves at 15:50 and it's a 17 minute ride, arriving at 16:07. Should I book it for you? Sentence11: I am also looking for a train departing from cambridge on tuesday, and arriving at ely by 17:15. Sentence12: Ask sounds good. What's the postcode? Sentence13: Thanks for your help Sentence14: Thank you, please book me. Sentence15: Would you like chinese or asian? Charlie chan serves chinese and is on the cheap side. Sentence16: I think that is all I need for today. Thank you. Sentence17: Congratulations! Your booking was successful and your reference number is SED9S4BH . Sentence18: The train arriving closest to 17:15 is TR4447 which arrives at 16:07. Would you like for me to book that for you? Sentence19: Before I book anything can you give me the price? Sentence20: You're more than welcome. Can I help you with anything else? Sentence21: The postcode is cb21uf, will that be all? Sentence22: How long does the train take to get to Ely? And when, precisely, does it leave? Question: Who has spoken the sentence 19? (A) User (B) System
Output: Answer: (B) System