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

Example Input: Sentence1: The address for Little Seoul is 108 Regent Street, City Centre. Is there anything else I can help you with? Sentence2: Yes, I would like both the phone number and the postcode please. Sentence3: I'm looking for an expensive restaurant in the centre if you could help me. Sentence4: I got that backwards. Need a train leaving Kings Lynn after 9:15 and arriving in Cambridge sometime on Saturday. Sentence5: There is a Korean restaurant called Little Seoul located at 108 Regent Street City Centre. Would you like their phone number? Sentence6: TR2514 leaves at 10:11 and arrives at 10:58. Will this one work for you? Sentence7: Sure. Could you tell me the exact travel time? Sentence8: Sure. The travel time for TR2514 is 47 minutes. Anything else I can help you with today? Sentence9: I sure can. There are lots of choices. Are you looking for a particular type of food? Sentence10: Have a wonderful day yourself. Goodbye. Sentence11: Can I also have the address please? Sentence12: that is it for today. good day thank you Sentence13: I also want to see the travel times for a train going from Kings Lynn from Cambridge on Saturday. It should leave after 09:15. Sentence14: Is there a time you would like to arrive by? Sentence15: The phone number for little seoul is 01223308681, postcode cb21dp. Can I help you with anything else today? Sentence16: No, not really. I think I'd like to try something different. Could you suggest something? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Can you book a table at the Bistro for me? 4 people at 13:30 on Sunday, please. Sentence2: I am looking for a place to eat that's expensive and serves Belgian food. Sentence3: I just need the arrival time and price. Sentence4: I have two, the backstreet bistro and the slug and lettuce. Do you have a preference between the two? Sentence5: Yes, what time do I need to be at the station? Sentence6: How about somewhere expensive in the centre? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : NSLKEI1G . Sentence8: I want to leave after 10:30 on Monday. Sentence9: The TR8089 meets your criteria. Would you like to book tickets? Sentence10: You're welcome, have a good day. Sentence11: no such restraunts too Sentence12: Thanks! I also need a train from Cambridge to Ely, please. Sentence13: what time will you be departing? Sentence14: I should be asking you what time you need to be at the station. Sentence15: The arrival time for train TR8089 is 12:07, and it will cost only 4.40 pounds. Is there anything else I can help with? Sentence16: I'm sorry, we don't have any Belgian restaurants. Would you like to try a different type? Sentence17: That was everything. Thanks very much! Sentence18: How about a gastropub restaurant? Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: How about TR5570 that leaves at 05:32? Sentence2: no thanks for your service i enjoyed Sentence3: Is there anything else I can help you with today? Sentence4: Where are you headed? Sentence5: How about the TR0788 train that leaves at 05:32? Sentence6: Yes, and I'll just need the train id and departure time. Sentence7: I can't imagine why I asked you to book passage. I always buy my own tickets. In any case, thanks ever so much. Sentence8: Booking was successful, the total fee is 35.79 GBP payable at the station . Reference number is : G2JZA2ZE . Sentence9: I will be leaving on Wednesday. Sentence10: Does that train arrive in Cambridge before 17:15? Sentence11: I am heading to Cambridge. Sentence12: I'm looking for a train departing from broxbourne. Sentence13: I will need to arrive by 17:15. Sentence14: TR0788 arrives in cambridge by 06:32. Would you like me to find something closer to arriving at 17:15? Sentence15: What day will you be travelling? Sentence16: Have a great day. Sentence17: Okay. Would you please book 2 tickets for that one? Sentence18: TR5972 leaves Broxbourne Wednesday at 15:32 and arrives in Cambridge at 16:32, The fare is 17 pounds 90. Question: Who has spoken the sentence 2? (A) User (B) System
Example Output:
Answer: (A) User