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: Sounds good. Could you give me their address please? Sentence2: Thank you, goodbye. Sentence3: No, problem. Will that be all for you today? Sentence4: Their address is cherry hinton road. Is there anything else I can assist you with? Sentence5: How about the cherry hinton hall and grounds? Sentence6: Yes, I also need their postcode and phone number. Sentence7: Okay, sure. The postcode is cb18dw and the phone number is 01223446104. Anything else? Sentence8: The area doe not matter, just some entertainment. Sentence9: Hi, I am looking for a entertainment attraction to visit. Do you have any recommendations? Sentence10: Great, thank you for all of your help. Sentence11: What area will you be going to? Sentence12: Yes, thank you. Goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User