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

Example Input: Sentence1: I leave on Tuesday and need to arrive by 11:30. Sentence2: I need a train that goes to Cambridge and departs from Bishops Stortford. Sentence3: I would recommend the lensfield hotel. It's a 3 star hotel in the south. Would you like more information or do you want to go ahead and book a room? Sentence4: The TR0635 leaves at 09:29, tickets cost 10.10 pounds and the duration of the journey is just 38 minutes. Would you like me to book you a seat? Sentence5: What time does the train depart? What is the price and total travel time? Sentence6: No but I also need a place to stay that should be in the expensive price range and should include free wifi. Sentence7: Nope, wherever you recommend will be great. THanks Sentence8: We have 5 hotels that meet your criteria. Is there a particular area of town you would like to stay in? Sentence9: Yes can you please do that for me? Sentence10: No, that will be all. Thank you! Sentence11: How many people should I book this for? What day? How many days will you be staying? Sentence12: ok, the booking was successful. Reference number is : N9Y9Q569 . can i help with anything else? Sentence13: Enjoy your stay. Sentence14: Book it for 8 people and 4 nights. We will be checking in on Thursday. Sentence15: What day will you be departing and time? Sentence16: Ok, the TR0635 arrives at 10:07. Question: Who has spoken the sentence 12? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Actually, I'm all set. Thank you! Bye! Sentence2: OK, great. will it be the same two people as on the train and starting on Monday? or do you have different needs for lodging? Sentence3: What is the price for that trip? Sentence4: Could you clarify if you need the reservation for 1 or 2 people please? Sentence5: Certainly, where will you be departing from? Sentence6: It look like the TR0532 is what you are looking for departing Bishops Stortford at 7:29 and arriving in Cambridge at 8:07. Would you like to book? Sentence7: The postcode for Worth House is cb41da and yes, it has internet! Sentence8: I would prefer the hotel be in the north part of town. Sentence9: I don't need to book today, thanks. Can you get me the postcode of one of them? Oh, and please make sure the one you choose has internet! Sentence10: Okay you sure you will not require a booking? Sentence11: I need a cheap hotel with free parking. Sentence12: The fare is 10.10 GBP per ticket. Sentence13: Okay let me see if I can book that for you. Sentence14: I need reservations for 2. Sentence15: Hi I am looking for a train to arrive in Cambridge by 08:15. Sentence16: Nope, same people. Sentence17: I've booked your tickets for the 7:29 train from Bishops Stortford, reference ZHT6R80S . Can you give me more information about the type of hotel you'd like? Sentence18: 1 person 5 nights please Sentence19: There are 10 total hotels, do you have a preference for area? Sentence20: I'd be happy to book that for you, what day will you be arriving on, and for how many nights? Sentence21: I'll be leaving from Bishops Stortford on Monday. Sentence22: I will go ahead an book at the Worth House. Sentence23: City centre north b and b and Worth house are both guesthouses and located in the north. Would you like me to book one for you? Sentence24: I need to make a booking for 2 people and can you find me a place to stay in the north? Question: Who has spoken the sentence 17? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you that will be all I need. Sentence2: I'm looking for a moderately priced place to stay in the south. Sentence3: I need to be there by 16:15. Sentence4: Ok I have booked that and the Reference number is 1N67NESA . Is there anything else I can help with? Sentence5: leicester is where i am going Sentence6: would you be leaving from cambridge? Sentence7: Thank you for using the Cambridge TownInfo Centre. Goodbye! Sentence8: Yes leaving from Cambridge, on Friday please. Sentence9: Would you like me to go ahead and book that? Sentence10: Thank you, I'll accept the recommendation at Aylesbray Lodge. Sentence11: I also need a train. Sentence12: Okay I have 19 trains. Could you give me a time by which you'd like to leave or arrive? Sentence13: Yes please. I would like to book it for 2 people for 3 nights starting from Wednesday. Sentence14: Okay, I have TR4170 that leaves at 9:09 and arrives at 10:54. It cost 37.80 pounds. Would you like this train booked? Sentence15: I have 2 options for you, both guesthouses. I recommend the Aylesbray Lodge, at 5 Mowbray Road. Sentence16: There are over two thousand trains. Where is your destination? Question: Who has spoken the sentence 8? (A) User (B) System
Example Output:
Answer: (A) User