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: I'm sorry but we don't have any restaurants meeting that criteria. Could you please try a different type? Sentence2: I'm afraid they're full on Sunday at 17:45. Perhaps another day, or another time slot? Sentence3: You are booked for Sunday at 16:45. Your reference number is 2W56MF47 . May I help you with something else? Sentence4: How about Sunday at 16:45 please for 1 person? Sentence5: You're welcome! Have a nice day! Goodbye. Sentence6: Grafitti has great British food in the west and fits the expensive pricerange you are looking for. Does this appeal to you? Sentence7: Please book for 1 person, sunday at 17:45. Sentence8: Cambridge lodge restaurant has good reviews and serves European food. Sentence9: Actually, I'd prefer a European restaurant. Sentence10: is there something else in the West? Sentence11: That's all. Thanks for the help! Sentence12: I want crossover food at an expensive price. Can you help? Question: Who has spoken the sentence 5? (A) User (B) System
Solution:
Answer: (B) System