You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: No thank you. That is great. Sentence2: Have a good day! Sentence3: There are three british restaurants in the west. What price range are you considering? Sentence4: Thanks! Sentence5: I'm looking for meals under 30$ a person. I need to book for 3 at 16:15 on Wednesday. Sentence6: The restaurant Saint Johns Chop House is the only restaurant to your specifications with a moderate pricing. Would you like me to make a reservation? Sentence7: Your booking is successful and your reference number is CZT3LA0M . Is there anything else I can help you with? Sentence8: Yes please and I will need a reference number. Sentence9: I am looking for a German restaurant in the west. Sentence10: Enjoy your time! Sentence11: There are no German restaurants available in the west. Would you like to try a different area or different food type? Sentence12: How about one that serves british food instead? Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: No, that's all I needed. Thank you for your help - goodbye! Sentence2: I will take the one that arrives at 15:08. can you make me a booking for 8 people on Wednesday? I will need a reference number. Sentence3: The train should depart from Cambridge on Wednesday and headed for Stansted Airport. It should arrive by 15:15. I would also like you to make a booking for 6 people. Sentence4: I'm looking for a train. Sentence5: I have two trains that would suit you. One arrives at 14:08 and the other at 15:08. Do you have a preference? Sentence6: I have 2,828 trains with different routes, to help narrow it down, where will you be departing/arriving, and what day/time? Sentence7: It was a pleasure to assist you. Please use us again for your future needs. Have a good day. Sentence8: Sure thing! I've booked the train for 8, and your reference number is I62H3VUY . Is there anything else I can do for you today? Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: The nearest police station is in Parkside, Cambridge, CB11JG Sentence2: No, that is. Good bye. Sentence3: You're welcome. Is there anything else I can do for you? Sentence4: Yes, their phone number is 01223358966. Sentence5: Great, thanks. Do you also have their telephone number? Sentence6: I need to find the nearest police station. Sentence7: Thanks for using our services. Sentence8: Great, thanks very much for the help. Sentence9: Do you have an address for them? Sentence10: What I have for them is Parkside, Cambridge. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System