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

Example Input: Sentence1: Yes, please provide a suggestion. Sentence2: Can you find me a good restaurant in the city centre? Sentence3: Okay, how about Eraina that's on Free School Lane City? Sentence4: Sounds great. Would you book me a table for 8, for Monday at 19:00? Sentence5: There are 11 museums is that area. The great thing is they are all free. Do you want additional information on any of them? Sentence6: Thank you so much for all your help. Sentence7: They are all located in the centre the same as the restaurant. Would you like me to recommend one? Sentence8: Are there any entertainment venues near the restaurant? Sentence9: Your table is booked! Reference #: GV2YF6H5 . The table will be reserved for 15 minutes. Can I assist you with anything else today? Sentence10: You are welcome. Enjoy your time in Cambridge. Goodbye. Sentence11: What area are they in? Sentence12: The fitzwilliam museum has amazing art and sculpture. The address is trumpington street and the phone number is 01223332900. Do you want more information? Sentence13: Your red toyota has been booked and its contact number is 07932820731. Sentence14: there are quite a number. what is your price range? Sentence15: The attraction should be in the same area as the restaurant and should be in the type of entertainment. A museum Sentence16: I will also need a taxi from the attraction to my dinning. Sentence17: I don't really have one but would like to try a European restaurant. Sentence18: There are 44 options available. Is there anything particular you are interested in ? Question: Who has spoken the sentence 15? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'm departing from Norwich and want to arrive by 13:00. Sentence2: Yes, I will need a train to cambridge on thursday. Sentence3: You are booked for 7 people, 5 nights starting thursday. Your reference number is ZFREK5SQ . May I help you with anything else today? Sentence4: the Kirkwood House is in the north and it sports a four star rating. It has internet and parking and the price range is moderate. Would you like to book? Sentence5: You're welcome. Have a great time! Sentence6: The travel time of that train is 79 minutes. Sentence7: thanks for your help you have been great! Sentence8: That sounds perfect. Can you reserve it for seven people? Sentence9: Where will you be departing from? Sentence10: I'm looking for a particular hotel called the kirkwood house. Where is it, and what other information do you have about it? Sentence11: TR3078 departs at 11:16 and arrives by 12:35. Would you like a ticket? Sentence12: not right now, what's the travel time on that ride? Sentence13: Sure, I can book it for you. What day did you want to arrive and for how many days? Sentence14: 5 nights starting Thursday. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Yes, please. I need the reference number for that as I said. Sentence2: You're very welcome. If you need anything else, please let us know. Sentence3: 1 guest arriving at Kirkwood House on Saturday and staying 2 nights. Your Reference number is : 414YSUQO . Would you still like me to find a restaurant for you? Sentence4: Yes, the address of The Hotpot is 66 Chesterton Road Chesterton, cb41ep. Can I be of further assistance? Sentence5: Type doesn't matter but I'd like it to be 4 star please. Sentence6: I'm sorry, I don't need a booking just yet. I would like to find a restaurant serving Chinese food, in the north. Sentence7: So for 3 people in total? Sentence8: Can you give me the address and post code, please? Sentence9: yes I need the reference number. I also want to find a restaurant. Sentence10: Okay, how many people and for how many days do you need that hotel. Sentence11: I have the kirkwood guesthouse. Would you like me to book that for you? Sentence12: I found several will you be needing a reference number for this booking? Sentence13: Yes, The Hotpot is expensive and in the north. Would you like me to book a table? Sentence14: There are eight in that area. Would you like to book one? Sentence15: oh yes, and please book for two more persons Sentence16: I'd also like it to have free wifi. But, it doesn't matter to me if there is free parking. Sentence17: Just myself, 2 nights starting saturday. Sentence18: Hi, I need a place to stay on the northend. Sentence19: Sure, how about the hotpot? Sentence20: No, I think that should be all I need for now. Thank you so much for your patience with me! Sentence21: Please be specific about the price range and hotel type you are interested in. Sentence22: Is the hotpot expensive? I want the restaurant to be expensive, in addition to being chinese food and in the north. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System