Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Problem:Sentence1: TR5886 leaves at 09:17, price is 23.60 pounds a person, do you want me to book you? Sentence2: We have many trains available that are leaving london kings cross after 8:15. What is the location of your destination? Which day would you like to leave on? Sentence3: I will be leaving after 8:15 from london kings cross. Sentence4: Which one would you recommend for me to visit as a tourist? I need the postcode, entrance fee and phone number for it. Sentence5: Is there a certain area you're looking at? Sentence6: I have made that reservation and your reference number is IADFZDHY . Sentence7: sweet, brah. i'm also looking to book a train. Sentence8: Thank you for contacting us and have a nice day. Sentence9: I highly recommend downing college. It's free! The postcode is cb21dq and the phone number is 01223334860. Sentence10: Yes, I'm looking for something close to the center of town. Sentence11: Thank you. Yes I would really love for you to book the train for 2 people. Sentence12: Is there a college in the centre area that you could give me more information on? Sentence13: Great, thanks so much! That's all I'll be needing! Bye bye! Sentence14: There are several, what would you like to know? Sentence15: Okay brah where you leaving from? Sentence16: I'm not finding anything close to the centre of town. Is there another area you'd like me to check for you? Sentence17: Any suggestions for entertainment? Sentence18: I will travel in Tuesday. Arrival is not important. Question: Who has spoken the sentence 17? (A) User (B) System
Solution:
Answer: (B) System