You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Yes, the restaurant name is Thanh Binh, the phone number is 01223 362456. The address is 17 Magdalene Street City Centre Sentence2: I want to find a restaurant in any area and servings persian food. Sentence3: Sorry, there are no restaurants serving Persian food available. May I help you find a different sort of food? Sentence4: vietnamese, please. Give me their address and phone number as well. Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System