Teacher:You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Thanks. I would also like to go a museum on the east side. Sentence2: Just the address, please. Sentence3: They are located at 5 greens road. Sentence4: What day would you like to travel on? Sentence5: I would like to leave on Tuesday after 21:00 from cambridge. Can you accommodate? Sentence6: I found 4 museums, I'd recommend the Cambridge Artworks as it is free to enter. Would you like any information on it? Sentence7: Thank you very much. Should be all Sentence8: I'm looking for a train to Broxbourne. Sentence9: I have booked your tickets. Your reference number is LJWDINYN . Is there anything else I can do for you? Sentence10: Thank you for using our services. Sentence11: 2 tickets on the 21:01, please. And can you give me the reference number once that's booked? Sentence12: Yes, there are trains departing at 21:01, 22:01 and 23:01 on Tuesday. Which time would like? Question: Who has spoken the sentence 9? (A) User (B) System
Student:
Answer: (B) System