Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: thank you good bye Sentence2: i am sorry no welsh restaurants in the north part of town. Sentence3: East and expensive Sentence4: Here you go, 01223 248882, 529 Newmarket Road Fen Ditton. Anything else today? Sentence5: There are several restaurant matches in this area. Would you like British, Indian, Gastropub, or Chinese? Sentence6: address and phone number for the chinese restaurant Sentence7: In what part of town? Sentence8: I need a restaurant Sentence9: Wait. How about that British restaurant? Where is it located? Sentence10: No, This is it. Thank you Sentence11: thank you, good bye. Sentence12: Is there a welsh restaurant in the north part of town? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User