You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I'd recommend the Acorn Guest House which is on 154 Chesterton Road. Do you need any other information? Sentence2: You are very welcome! Enjoy your day! Goodbye! Sentence3: Any of them a type of guesthouse? Sentence4: Sorry, I did not found a 4 star hotel in the north. Can I look in the south? There are several nice 4 stars hotel in the south. Sentence5: Thanks for that information. That's all I need for now. Have a great day! Sentence6: No I don't need those things, could you give me the address of one that you recommend? Sentence7: For guesthouses, I do happen to have 8 listings. I have one cheaper, and the others are all moderately priced. Do you need any free wifi or parking? Sentence8: Hello, is there any 4 star places to stay in the north? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User