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

Input: Consider Input: Sentence1: Hi, I'd like to book a train that leaves after 21:30 on Friday. Sentence2: You're very welcome! Enjoy your trip! Sentence3: There are 4 restaurants that serve gastropub cuisine. Do you have a location and/or price preference? Sentence4: Yes could you provide me with the travel time and arrival time as well please? Sentence5: Moderate price range please. Sentence6: Please, for 7 people at 13:00 on the same day. Sentence7: TR8202 is leaving cambridge at 22:01 would that work for you? Sentence8: I'll be leaving Cambridge and traveling to Birmingham New Street. Sentence9: Yes can we try the south? Sentence10: The travel time for the TR8202 is 163 minutes. The arrival time is 24:44. Is there anything else I can help you with? Sentence11: I'm also looking for a place to dine. The restaurant should serve gastropub food. Sentence12: Perfect, there's a place called The cow pizza kitchen and bar, would you like me to book it? Sentence13: Sure, where are you departing from and going to? Sentence14: How about centre? Sentence15: Booking was successful. The table will be reserved for 15 minutes. Reference number is : BGGCS2UB Sentence16: Thank you so much. That's all I need today. Have a great day! Bye. Sentence17: Yes, there are 3! Price ranges are moderate and expensive. Does one of those suit you? Sentence18: I am sorry there are none in the South. There are 3 in the centre and 1 in the east. Will one of those area work for you? Question: Who has spoken the sentence 8? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: I just need to find a train that leaves at 19:30 for 5 people Sentence2: Is there another day you would like me to check? Sentence3: Hi, I'm looking for any information that you have on the Lensfield hotel in Cambridge. Sentence4: Nope that should be it thanks. Sentence5: I only have trains that leave at 20:24 and later on a Friday from Stansted airport. Will this time and day work for you? Sentence6: Alright, I booked 5 tickets for Saturday train your reference number is 1R61PO9r . You can pay for your tickets at the station. Is there anything else? Sentence7: Unfortunately, no trains leave at that time Sentence8: Unfortunately there are no trains that leave at this time. Sentence9: I'm staying for 2 days and it's just myself. What train can I take to depart from the stansted airport that leaves at 19:30? Sentence10: What are the other 4 times of departure for Saturday. I'll need bookings for 5 people and a reference number. Sentence11: Glad to be of service. Have a wonderful day! Sentence12: The Lensfield Hotel is an expensive, 3-star hotel in the south of town, with internet and parking. Would you like me to book it for you? Sentence13: Sure, the phone number is 01223355017. How many days will you be staying, what day do you need to arrive, and how many people will be staying? Sentence14: There are only 4 trains that leave on Saturday Sentence15: I'm actually looking for something on Saturday. Are there any trains on Saturday that leave at 19:30? Sentence16: Yes, please. Can you also give me the phone number? Question: Who has spoken the sentence 1? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: I will be travelling on Wednesday. Sentence2: I'm looking for a hotel room. Can you help me find one? Sentence3: What area would you like to stay in? Sentence4: Well the Autumn house is my recommendation, cheap price four stars and located in the east. Would you care for more info or a booking? Sentence5: Yes, there are nine hotels you can stay at what area and price range do you want? Sentence6: Yes, I would like to book a train from cambridge to stansted airport please. Sentence7: i can help you with that. what day are you traveling? Sentence8: I was able to book the room, your reference number is 2BU7S7NI . Would you like any more assistance today? Sentence9: Booking was successful, the total fee is 70.7 GBP payable at the station .Reference number is : 3XBEBG2W . Anything else? Sentence10: Yes, please. I need 7 tickets. Sentence11: Yes. Book for 7 people for 2 nights starting on Wednesday. Sentence12: The area does not matter. Sentence13: I'd like to arrive by 14:15 and would like to book on the same day as the hotel booking, please. Sentence14: I would prefer a guesthouse in the cheap price range. Sentence15: Thank you. That is all that I need. Sentence16: i have train tr7996 that leaves at 13:40 and arrives by 14:08. would you like any tickets? Sentence17: What time would you like to leave and/or arrive on Wednesday? Sentence18: Have a nice day, goodbye. Question: Who has spoken the sentence 5? (A) User (B) System
Output: Answer: (B) System