You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Good bye. Please call again if you have further questions. Sentence2: What is their address and what part of town are they in? Sentence3: Da vinci pizzeria serves cheap italian food. Would you like their address or phone number? Sentence4: Good bye. Sentence5: They serve italian food. Sentence6: Da Vinci Pizzeria is in the north part of town. The address is 20 Milton Road Chesterton. Sentence7: thank you, goodbye! Sentence8: Thank you. Goodbye. Sentence9: Sorry what type of food do they serve? Sentence10: I would like a cheap restaurant which serves italian food Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User