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: Which hotel is a star of 3? Sentence2: Gonville, shall I book it for you? Sentence3: Yes, that would be fine. Please book it for 7 people starting Tuesday for 2 nights. Sentence4: I'd like to find a hotel in the centre of town with free parking, please. Sentence5: I am leaving from cambridge and need to arrive at london liverpool street by 08:00 for a meeting. Sentence6: Sure thing. There are 2 hotels available, Gonville hotel and University Arms Hotel. Which hotel do you prefer? Sentence7: The Booking was successful, the total fee is 116.2 GBP. Reference number is : 1P1T8F7D . May I help with anything else? Sentence8: The duration lasts 88 minutes. Have a nice day. Sentence9: Do you have a departure or arrival time you would like? Sentence10: No, that's all I need right now. Thank you and have a nice day. Bye Sentence11: Success. Your reference number is NQF2R59K . Sentence12: Thank you. I also need a train going to london liverpool street on wednesday. Sentence13: Let's try it for one night then please Sentence14: Yes please book the the train for 7 people and can I get the reference number. Sentence15: TR1047 will get you there by 7:27, will that work for you? Sentence16: I 'm afraid the booking was unsuccesful. Would you like to try another day or a shorter stay? Question: Who has spoken the sentence 15? (A) User (B) System
Solution:
Answer: (B) System