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

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: You're very welcome! Goodbye. Sentence2: When and where did this accident occur? Sentence3: Absolutely! The police station phone number is 01223358966 and their address is Parkside, Cambridge. What else can I do to help? Sentence4: I just need an address and phone number for the police please Sentence5: I was in a car accident dispute and I am looking for help Sentence6: I think that is it, thank you. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I am trying to book you on Train ID TR3211 and the cost for one person is 13.2 pounds. Please may i have the data of the four passengers? Sentence2: I need a train from cambridge on sunday. Sentence3: Just need the four tickets. Sentence4: I can try to find something for you in the morning. Do you have a more specific time in mind? Sentence5: Hobsons House if a guesthouse located in the west and is moderately priced. It has a 3 star rating and is located at 96 Barton Rd. Book it for you? Sentence6: Yes please make a booking for 4 people. Sentence7: There are several trains that match the criteria. what time do you want t leave? Sentence8: I'd like to leave after 09:00 and head to Peterborough. Sentence9: I am thinking the morning would be better for me. Sentence10: I have train TR3211 that leaves at 09:06 and will have you in Peterborough at 09:56. Would that work for you? Sentence11: Booking was successful, the total fee is 52.8 GBP payable at the station. Your reference number is L3RH9ZWP . Do you need anything else? Sentence12: I also need information on a hotel called hobsons house. Question: Who has spoken the sentence 3? (A) User (B) System
Example Output:
Answer: (B) System