Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Hi there, I am looking for a train going to Cambridge, and departing from London liverpool street. Can you book me one? Sentence2: Thank you for using our system today! Sentence3: No, I don't need it booked right now. I would really like to find a college to visit in town. Sentence4: Thank you for that information, you've been very helpful. I will call back when I'm ready to book the train. Goodbye. Sentence5: Absolutely. The travel time is 88 minutes for that route. Would you like me to book a ticket for you? Sentence6: Yes. Could you tell me what the entrance fee is? Sentence7: The first train after 17:45 from London Liverpool Street to Cambridge leaves at 19:39 and arrives at 21:07. Would that be to your liking? Sentence8: Absolutely. Can you please tell me what day you would like the booking to be made for? Sentence9: The entrance fee is 2.50 pounds. Is there anything else I can help you with? Sentence10: That would work, could you tell me the travel time for that as well? Sentence11: I have many colleges but I could recommend clare hall. It is on the west side. Would you like more information on one? Sentence12: I'll be traveling on Saturday, please. Oh and I don't want to leave too early, let's say something after 17:45. Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System