Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: The address is 108 Regent Street City Centre. Do you need any further information? Sentence2: I'm sorry, there are no Tuscan restaurants in the expensive price range. Would you like to try something else? Sentence3: Hi, I want a Tuscan restaurant that's expensively priced. Sentence4: Yes please. Sentence5: No, thank you. Sentence6: Little Seoul is an expensive restaurant in the Centre area. Would you like the address? Sentence7: How about korean food? Sentence8: enjoy your meal! Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System