Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Thank you so much! Sentence2: Yes. Thanks, all set. Sentence3: Much appreciated. Goodbye. Sentence4: We have 21 trains coming form ely to cambridge this week, what day will you need that? Sentence5: What's their address and postcode? Sentence6: I'm looking for a train leaving after 19:00 departing from ely. Sentence7: Booking was successful, the total fee is 13.2 GBP payable at the station. Your reference number is AUHGVOLR . Will that be all for today? Sentence8: I think the 19:35 will work. Can I book that for 3 people? Sentence9: Their address is cambridge passenger cruisers, jubilee house, cb43ax. Will that be all? Sentence10: We have 3 trains from Ely to Cambridge on Thursday leaving at 19:35, 21:35 and 23:35. Sentence11: We were looking to do something in the north, something with the boats. Any suggestions? Sentence12: I need the train on Thursday. Sentence13: You are welcome! Enjoy your trip! Sentence14: riverboat georgina is located in the north. Question: Who has spoken the sentence 8? (A) User (B) System
Output:
Answer: (A) User