Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: There is a train every hour from Birmingham New Street to Cambridge starting at 5:40. It costs 75.10 pounds and is 163 minutes. Sentence2: You're welcome. You, too. Sentence3: Please give me a call if you need any assistance during your visit Sentence4: No, I just need the postcode and address as well as a phone number. Sentence5: OK, I have a few options, what side of town would you like that on? Sentence6: I also need a restaurant in the expensive price range and should serve european food Sentence7: Thank you for contacting us. Have a good day. Sentence8: Could you make that on the north side please. Sentence9: On Monday the TR3734 arrives by 15:23. Would you like to book some tickets for that? Or perhaps an earlier train if you think that's cutting it too fine. Sentence10: I think that would be too late. I also need it on Monday, not right now. Sentence11: I am looking for a train leaving from Birmingham New Street and arriving by 16:00. Sentence12: There is one expensive European restaurant in the north - City Stop Restaurant. Would you like to reserve a table there? Sentence13: The address is Cambridge City Football Club Milton Road Chesterton. The postcode is cb41uy. The phone number is 01223363270. Is there anything else I can do for you? Sentence14: Booking was successful. The total fee is 300.39 GBP payable at the station. The reference number is GXTXW2EM . Is there anything else I can help with? Sentence15: I think that would be good, can you get me 4 tickets? Sentence16: No that is everything I need for my trip. Thank you! Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System