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. I will be staying 5 nights starting Friday. Sentence2: Im also looking for the cow pizza kitchen and bar. Whats the address for it? Sentence3: its address is Corn Exchange Street. what else can i do for you? Sentence4: Oh, expensive please. I do hope it is a guesthouse? Sentence5: You have helped me with everything I need. Thank you. Sentence6: Anytime. Enjoy your visit. Sentence7: I'll be staying for 5 nights. Sentence8: Unfortunately they are both hotels. Sentence9: Booking was successful. Reference number is : GQPN80PK . Is there anything else I can assist you with today? Sentence10: Okay I've got three options here. Would you like a cheap or an expensive price range? Sentence11: Can you help me locate a hotel to stay at that has free parking and a 4 star rating? Sentence12: Oh. I would really prefer a guesthouse. How about the moderate price range? Sentence13: Okay, I recommend The Acorn Guesthouse. Would you like me to book there? Sentence14: NO problem. How long are you staying? Sentence15: The location isn't important. I need to book it for Friday, please. Sentence16: They are moderate, it is a gastropub, in case you need them, the postal is cb23qf and the phone number is 01223308871, can I assist with anything else? Sentence17: I have 9 guesthouses in the moderate price range, do you have a location preference? Sentence18: I need it's price range please Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you so much. The restaurant and train are all I need for now. Have a great day. Goodbye. Sentence2: I'll need to arrive by 11:00 and it should be going to london liverpool street. Sentence3: yeah i need a train too Sentence4: Train TR4259 arrives in London Liverpool Street at 9:27. It's the closest arrival time to 11:00. How many tickets would you like to book? Sentence5: Understood. You have a choice between Sala Thong and Bangkok City. Sentence6: Booking was successful. The table will be reserved for 15 minutes. Reference number is : RARTE3OH . is there anything else i can help you with? Sentence7: Can you help me find some Thai food to eat tonight? Sentence8: I would like 2 tickets please. Sentence9: Ok! Have a great day! Sentence10: I don't care where, just as long as it's expensive! Sentence11: What area of town would you prefer? Sentence12: Sala Thong sounds good. Please make a booking for 2 at 11:45 on Monday Sentence13: Where will you be leaving from? Sentence14: Let's pick something arriving between 11:00 and 10:30. It needs to depart from cambridge and leave on tuesday. Sentence15: There are 21 trains available. Would you like to narrow it down by departure site, day, or departure time? Sentence16: Your reservation for 2 on the TR4259 train was successful, the total fee is 33.2 GBP payable at the station. Your Reference number is : FNRSFZWB Question: Who has spoken the sentence 8? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Yes one in the same area and price range please. Sentence2: I apologize the Bedouin does not have any open seats for that day and time. Would you like me to try another restaurant? Sentence3: I would recommend Papadoux they are very expensive and right in the center of town Sentence4: So happy we could be of service today. Enjoy your time in Cambridge! Sentence5: Yes I am looking for an expensive place to eat that is located in the city center. Sentence6: Okay I was able to book you into the Kymmoy, an expensive Asian restaurant in the center of town and your reference number is YCQWEGOS . Sentence7: Hmm. I feel like discovering something new. Which restaurant would you recommend? Sentence8: There are quite a few restaurants in the center. What kind of cuisine are you interested in? Sentence9: Great! Thank you so much for your help. Sentence10: I'm sorry, Papadoux is not coming up. There is an expensive African restaurant called Bedouin in city centre. Would you like me to try that one instead? Sentence11: Yes, or any in the same expensive range and the centre area. Sentence12: That sounds great. Could you book a table for one at 11:15 on Friday? Sentence13: No thank you for all your help. Sentence14: You're very welcome. Is there anything else I can help you with today? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System