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

Example Input: Sentence1: There are 5 expensive Indian restaurants available in the west. Would you like me to book one of those for you? Sentence2: Can you help me find and expensive restaurant in the west? Sentence3: I would like to eat at an indian restaurant please. Sentence4: You are welcome. Thank you for calling Cambridge TownInfo Centre. Good bye. Sentence5: Yes, please choose one and book it for 6 people at 13:30 on Thursday. Sentence6: We have nine. What sort of cuisine would you like? Sentence7: No, that's it for today. Thank you for all your help. Good bye. Sentence8: Ok. I was able to book cocum on thursday at 13:30 for 6 people. Your reference number is LTZ2TPIA . Can I help you with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Hmm. What about museums? Sentence2: Booking completed! Your contact number is 07349924614. The car type is a black ford. Can I help you with anything else? Sentence3: I don't care about wifi or parking. To be honest, I don't care what area it is in, either. What would you pick? Sentence4: Cambridge and county folk museum is available, would you like that? Sentence5: Can you tell what time you want to be picked up and at which location? Sentence6: I'm also looking for an attraction preferably on a boat in the west. Sentence7: Sure. That sounds good. Can I get their address and postcode please? Sentence8: Thanks! I also need a taxi between both locations, please. Sentence9: Wow that was fast thanks! No, that is all I needed. Hope you have a wonderful day. Sentence10: Sounds nice. What is the address and postcode please? Sentence11: I want to leave the hotel by 23:15. Sentence12: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence13: I'm looking for a moderately priced guest house. Can you recommend one? Sentence14: There are 15 options. Do you have a specific area you would like to stay in? And are you interested in wifi and parking? Sentence15: I would go with the Acorn Guest House if I were choosing a moderately price guesthouse. Sentence16: Sure their address is 2-3 Castle Street and the postcode is cb30aq Sentence17: The address is 154 Chesterton Rd, the postal code is cb41da, is there anything else that I can assist with? Sentence18: There are no boats in the west, can I try something else for you? Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I need a cheap guesthouse in the north. I'm looking for information not reservations. Sentence2: Could you tel me the star of the hotel? Sentence3: Yes, please book 3 tickets. Sentence4: Great I'm also looking for a place to stay in the expensive price range with free parking. Sentence5: I have 2 guesthouses, when are you planning your stay, I am sorry Sentence6: There are 19 trains available on that day. Do you have a departure or arrival time in mind? Sentence7: Arrive by 11:30. Sentence8: I have booked 3 tickets on TR4969. Your reference number is MPL4USAC and the total fee is 42.24, payable at the station. Can I assist you with anything else? Sentence9: What area of town could you like the hotel to be located? Sentence10: It is a 4 star hotel. Sentence11: Do you want to stay in a certain area? Sentence12: Ok great. There are two places available. I highly suggest the Worth House. What information do you need? Sentence13: I am planning a trip in Cambridge. Sentence14: There are none with that criteria in the North. Shall I change or try another area? Sentence15: Thank you for reaching out to Cambridge TownInfo Centre. Goodbye. Sentence16: Could you try a cheap one then? Sentence17: I'd recommend TR4969. It arrives by 10:55. Would you like a ticket? Sentence18: No,I am actually looking for information about trains going from Cambridge to Norwich on Sunday. Sentence19: great, thank you for your help. goodbye Sentence20: I would lkle to stay In the north please. Question: Who has spoken the sentence 19? (A) User (B) System
Example Output:
Answer: (B) System