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

Sentence1: Enjoy your trip! Sentence2: Yes, is there an entrance fee? Sentence3: That takes care of my needs today. Take care. Goodbye. Sentence4: price is 4.40 pounds should i book it for you? Sentence5: Yes, please book it for 8 tickets for me and pleases give me the reference number. Sentence6: I would be happy to assist you in finding a train! Can you please advise where you will be traveling to? Sentence7: I have 3 options to choose from: arrival times of 5:52, 7:52 and 9:52. Which do you prefer? Sentence8: I'm also looking for information on the Whipple Museum of the History of Science. Sentence9: I was able to book 8 Train tickets for you at the cost of 35.2 GBP, which is payable at the station. The reference number is 27OF6EO3 . Sentence10: The entrance fee is free. Is there anything else I could help you with? Sentence11: Cambridge. I need to get there by 11:15. Sentence12: I will take 9:52 Sentence13: I need a train. The train should depart from ely and should leave on thursday. Sentence14: Okay, it's a museum in the city centre. Would you like more information on it? Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User