Instructions: 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! Goodbye. Sentence2: The phone number is 01223257168. Sentence3: I'm glad I could help. Have a wonderful day! Sentence4: Hi, can you tell me the details of local hospitals? I'm looking for a hospital that has the Cambridge eye unit department. Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System