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: There are three results with your preferences of east area and moderate price range. Sentence2: is there a moderate priced restaurant? Sentence3: That's it, goodbye Sentence4: you are welcome goodbye Sentence5: I found several. Do you have a preference on location? Sentence6: What is the address of one of them? Sentence7: 451 Newmarket Road Fen Ditton Sentence8: Yes, in the east part of town. Sentence9: Excellent, thanks! Sentence10: Is there anything else I can help you with? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User