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: Of course, when would you like your reservation to be and for how many people? Sentence2: Do you have a area preference? Sentence3: No that will be all. Sentence4: Excellent, I have booked you a table for 6 at 17:00. Tables are reserved for 15 minutes. The reference number is RI11SSDU . Sentence5: Does it have free wifi? Sentence6: Acorn guest house matches your requirements, would you like to book there? Sentence7: Do you need anything else? Sentence8: What are my choices for a moderate hotel? I don't need free parking. Sentence9: The hotel does have internet. Sentence10: I have results for 18 moderately priced places, what area are you looking to stay in? Sentence11: Great can I get their address, phone number, and postcode? Sentence12: I would like to make a reservation at Hotel Du Vin and Bistro. Sentence13: I have 2 European and 2 Modern European. Do you have a preference? Sentence14: Thank you for contacting Cambridge TownInfo Centre, enjoy you hotel stay and your dinner! Sentence15: I would like the restaurant to be in the Centre and serve European food. Sentence16: The acorn guest house is located at 154 chesterton road, postcode cb41da and the phone number is 01223353888. Sentence17: Yes, in the centre. Sentence18: Six people on Wednesday, at 17:00 Sentence19: Thank you so much for all your help! Sentence20: I am also looking for a restaurant. The restaurant should be in the same price range as the hotel and should serve European food. Sentence21: No particular area, I need a hotel with a 4 star rating. Sentence22: There are 2 to choose from: Hotel Du Vin and Bistro, and Galleria, and there are 2 others that are similar, but serve modern european. Do any of these sound good? Question: Who has spoken the sentence 10? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: I am sorry, but the Leverton House was not available for your party on Tuesday. Would you like me to look for another hotel? Sentence2: In what area would you like? Leverton is in the East, should the hotel be in the same area? Sentence3: Is there another hotel available in the same price range? Sentence4: Hi, I'm looking for a hotel called Leverton House. Sentence5: No, you said Leverton wasn't available. Please just book a different hotel in the same price range as Leverton. Thanks. Sentence6: I have booked you a room at the Alexander Bed and Breakfast at 56 Saint Barnabas Road. Your reference number is JGTE0KGB . Is there anything else today? Sentence7: No, I don't care about the area, just the price. Recommend me one? Sentence8: You're welcome. Good-bye. Sentence9: The Leverton House is a guesthouse in the east of the city. Their phone number is 01223292094. Sentence10: Yes Leverton is in the cheap price range. Would you like me to book it for you? Sentence11: Thank you. Please book a reservation for 6 people for 2 nights starting tuesday. Sentence12: That will be all, thank you. Question: Who has spoken the sentence 1? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: It's cb21sj. Anything else you need assistance with? Sentence2: Cambridge has 23 museums. What area of town would you like to go to one in? Sentence3: Great. Thanks. I'm also looking for a museum to check out. Can you help me with that? Sentence4: there are many. Where would you like to travel to? Sentence5: Booking was successful, the total fee is 80.8 GBP payable at the station . Reference number is : 3AWBI59X . Sentence6: Greetings, are there are any trains leaving bishops stortford. Sentence7: Certainly, the Byard Art is a museum in the south part of town. Their address is 14 king's parade. Would that work for you? Sentence8: Train 0277 leaves at 17:29 and arrives at 18:07. Would you like me to book you a ticket? Sentence9: That is all for today, you were very helpful. Sentence10: I need to leave after 16:30. Sentence11: Can you tell em the postcode as well please? Sentence12: Yes make a booking for 8 people and give reference number. Can you suggest places to go like museums in Cambridge? Sentence13: Can you find one in the south please? Sentence14: I would like to leave on thursday to cambridge. Sentence15: I have 10 trains leaving Bishops Stortford for Cambridge on Thursday. What time would you like to depart? Sentence16: Thank you so much! You have a wonderful day! Bye! Question: Who has spoken the sentence 15? (A) User (B) System
Output: Answer: (B) System