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: Booking was successful, the total fee is 450.6 GBP payable at the station . Reference number is : G368B2VI . Can I help with anything else today? Sentence2: I would like to stay in the centre of town please. Sentence3: TR0254 Leaves at 05:40, would you like me to book that for you? Sentence4: I will be departing from Birmingham New Street on Tuesday. Sentence5: The price is 75.10 pounds and it is a 163 minutes ride. Can I help you with anything else? Sentence6: Please book 6 tickets and send me the reference number. Sentence7: No thank you. Please tell me about the ticket pricing and time of travel Sentence8: Okay, the postcode is cb11ly. What else can I help with? Sentence9: No, not yet. I just need the postcode. Sentence10: Thanks for using Cambridge TownInfo centre. Have a great day! Sentence11: I'm looking for a train that goes to Cambridge and arrives by 08:45. Sentence12: The Gonville Hotel will meet all of your needs. Would you like me to book it? Sentence13: I found two expensive hotels, one in the centre and one in the south of town. Do you have a preference? Sentence14: Again, 3 star with free wifi. I don't care about the price. It has to be in the centre, though. Sentence15: That is all, thank you for your help today. Sentence16: Yes please. I need a 3 star hotel that offers free wifi Sentence17: I found 231 trains that fit your request. Where will you be departing from? Sentence18: What price range and what star rating are you looking for ? Question: Who has spoken the sentence 3? (A) User (B) System

Output: Answer: (B) System


Input: Consider Input: Sentence1: Your booking was successful! Your reference number is EV4ADBI9 . Sentence2: I need it for Sunday. Sentence3: Yes. Let's book it. Sentence4: I would like it to be in the west. It doesn't matter if it has free parking or not. Thank you! Sentence5: There are four three star guest houses. Is there an area of town that interests you the most? Sentence6: Train TR3154 leaves cambridge at 13:06 and will arrive at peterborough at 13:56 on Monday. Would you like me to book a ticket? Sentence7: I am looking to stay at a guesthouse that has a 3 star rating. Sentence8: ok for how long and how many people please Sentence9: I want a train that goes to peterborough and leaves after 13:00 Sentence10: Does it leave on Monday? Sentence11: There is the hobsons house. Would you like me to book it? Sentence12: For 3 days and 2 people,I need a confirmation number too Sentence13: and what day do you need the reservation for? Sentence14: The next train is the TR0545 leaving cambridge at 13:06. Would you like me to book it or more information? Question: Who has spoken the sentence 12? (A) User (B) System

Output: Answer: (A) User


Input: Consider Input: Sentence1: Yes I need it to go to cambridge, is that possible? Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : AYQO5ZTE . Can I help you with anything else? Sentence3: We have 2 trains that match your criteria - the TR0788 that leaves at 05:32 and the TR0605 that leaves at 06:32. Which one should I book for you? Sentence4: wednesday and I want to get there by 08:00 leaving broxbourne, how much is that? Sentence5: Do you need a taxi? Sentence6: Have a great day. Good bye. Sentence7: The trip will cost 17.90 pounds. Sentence8: I am planning a trip in Cambridge. Sentence9: what area please and how many tickets Sentence10: We have several great options, most of which are in the center of town. My favorite is Caffe Uno. Sentence11: No, I don't need it booked. What's the price for the TR0788? Sentence12: Sounds great. I need a reservation for 1 on Wednesday at 15:30 Sentence13: Yes, I am happy I could assist. Sentence14: The price is 17.90 pounds. Can I help you with anything else today? Sentence15: Okay, how can I help you? Sentence16: No that is it, thank you! Sentence17: im looking for an expensive restaurant that serves italian food Sentence18: I will also need a train Question: Who has spoken the sentence 15? (A) User (B) System


Output: Answer: (B) System