Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Is there anything else? Sentence2: That will be good. Thank you! Sentence3: Can you recommend a restaurant to me in the South part of town? I don't want to spend a lot of money. Sentence4: What is the phone number? Sentence5: The Lucky Star is a Chinese restaurant that is cheap and on the South side of town. Sentence6: The phone number of The Lucky Star is 01223 244277. Sentence7: Two results with cheap price range in the south area of town. One is Nandos which is Portuguese food. The other is The Lucky Star, which is Chinese food. Sentence8: What type of food are you looking for? Sentence9: The type of food doesn't matter to me. Sentence10: Thank you, goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User