You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Goodbye Sentence2: I would like a moderately priced restaurant in the south part of town Sentence3: Thank you goodbye. Sentence4: The address for pizza hut cherry hinton is G4 Cambridge Leisure Park Clifton Way Cherry Hinton and the phone number is 01223 323737 Sentence5: What type of food do each of them serve? Sentence6: Goodbye again. Sentence7: Yes, what is the address and phone number for Pizza Hut Cherry Hinton? Sentence8: I have two restaurants. They are Pizza Hut Cherry Hinton and Restaurant Alimentum. Sentence9: What type of food do they serve? Sentence10: Goodbye. Sentence11: They serve italian food. Can I help you with anything else? Sentence12: Pizza Hut Cherry Hinton is Italian, and Restaurant Alimentum is Modern European. Would you like information on either of them? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User