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: The missing sock serves cheap international food and is in the east. Would you like more information? Sentence2: No, that's it. Thank you. Sentence3: I'd like to find information for the restaurant called The Missing Sock. Sentence4: Thank you. Be sure to contact us whenever you need reservations. Question: Who has spoken the sentence 1? (A) User (B) System
Solution:
Answer: (B) System