You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Their address is Parkside, Cambridge Sentence2: Thank you so much. Do you have their address? Sentence3: You are more than welcome! Sentence4: Sure! I think you'll need the police. Their contact number is 01223358966. Sentence5: Thank you so much! I think that is all I need today. Sentence6: There's been a traffic accident and I need some help resolving a dispute about it. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User