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: Where will you go to ? Sentence2: The phone number is 01223452587. Sentence3: I will be travelling to Leicester. Sentence4: Okay. My computer shows forty-four attractions in the centre of town. Can you give me some more details so we can narrow the search? Sentence5: I need the phone number and postcode. Sentence6: TR8631 cost 37.80 pounds Sentence7: I am looking for a place to visit in the centre of town. Sentence8: Of course, I would recommend the All Saints Church. What would like to know about it? Sentence9: I'd be happy to provide you that information. The address is jesus lane and the postcode is cb58bs. Is ther anything else I can assist you with? Sentence10: Could I get the phone number as well? Sentence11: I also need a train leaving from cambridge on monday. Sentence12: No matter can you just recommend one? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User