Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Hello! My friends told me about a hotel called Alexander Bed and Breakfast. Can you get me some information about it, please? Sentence2: They have internet, it has a 4 star rating, and the postcode is cb12de. Sentence3: It's my pleasure. Goodbye1 Sentence4: The TR5170's trip duration is 51 minutes, and it costs 18.88 pounds. Can I help with anything else today? Sentence5: Going to london kings cross. I want to leave after 10:15. Sentence6: do they have internet? how many stars does it have? and whats its postcode? Sentence7: What is your desired destination and timeframe for travel? Sentence8: I believe that will be everything. Sentence9: Have a great trip! Sentence10: Thank you. You have been very helpful. Sentence11: No thank you. I would like the travel time and price information if you can provide it, however. Sentence12: Yes she lives in. Barbers lost his son and and sleeps and eats a lot Sentence13: Great! I will also need a train. I need to leave on Saturday and depart from Cambridge. Sentence14: The TR5170 departs Cambridge on Saturday at 11:00 and arrives in London Kings Cross by 11:51. Would you like me to book that for you? Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User