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, I will be in Cambridge later on this week and I can't seem to find King's college. I am not sure how to find it, can you help? Sentence2: I've booked you on TR8185, for 7 people. It departs Cambridge at 13:36 and arrives in Norwich at 14:55. Sentence3: There is no entrance fee, Kings College is FREE! Sentence4: And what's the entrance fee? Sentence5: I have a train that departs from Cambridge at 13:38 and arrives in Norwich by 14:55. Would you like to place a booking? Sentence6: I would like to arrive by 15:15. Sentence7: No, that was all I needed today. Thank you for your help. Sentence8: Thank you for using our system! Sentence9: The booking reference number is 9SDIIVSB . Anything else I can help you with? Sentence10: Thank you. Can I have the reference number for that booking? Sentence11: I found 133 trains going to norwich, what date, time or station will you be leaving from? Sentence12: There are 19 that leave on Sunday from Cambridge. Do you want to depart or arrive by a certain time? Sentence13: Yes, Kings College is in the center of town and the address and postal code is King's Parade, cb21st respectively. Sentence14: I would like to make a booking for 7 people please. Sentence15: I would like to leave on Sunday and depart from cambridge. Sentence16: That's great! Can you also help me find a train going to norwich? Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System