You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: The missing sock is a cheap restaurant in the east part of town. Would you like their location? Sentence2: I want to know their address, phone number, and type of food, please Sentence3: Hello. I'm looking for a cheap restaurant in the east part of town. Sentence4: The Missing Sock serves International food and is located at Finders Corner Newmarket Road. The phone number is 01223 812660. Sentence5: Thank you for using our system. Good night Sentence6: Thank you, that is all I needed to know. Have a good night. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User