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: 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

Output: Answer: (A) User

Input: Consider Input: Sentence1: the cambridge and county folk museum is located 2-3 castle street Sentence2: Yes, that would be great. There will be 7 of us. Sentence3: Do you have any 0 star places? Sentence4: Is there one in the moderate price range? Sentence5: I'd like to start on Friday please and stay for 3 nights. I will also need the reference number. Sentence6: Thanks, can you also give me the entrance fee, phone number, and postcode? Sentence7: Yes, Cityroomz is in the moderate price range. Would you like to make a reservation? Sentence8: Okay. Would you like to narrow it down by the area, price range, or type? Sentence9: I'd be happy to make a reservation for the 7 of you. I will need to know what day to start your reservation and for how many nights, please. Sentence10: I also need a place to stay. Sentence11: That will be all, and thanks so much for your help. Sentence12: I have 2 guesthouses and 1 hotel that are 0 stars, do you have a preference or want a particular area of town? Sentence13: I'm looking for the cambridge and county folk museum. Sentence14: The fee is 3.5 pounds, the number is 01223355159, and the code is cb30aq. Sentence15: Have a nice day. Sentence16: Your reservation for 7 people at Cityroomz this friday for 4 days 3 nights was successful. Your Reference number is : SOF4G9MY . Anything else I can do for you? Question: Who has spoken the sentence 1? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: You're welcome, have a nice day. Sentence2: Your taxi has been booked. The contact number is 07330545456. Is there anything else I can help you with today? Sentence3: Okay well please call back if you change your mind. Sentence4: I'd love to visit a park, especially a botanical garden if one is in that area! Sentence5: Will it arrive at the restaurant by the booked time? Sentence6: Booking was successful. The table will be reserved for 15 minutes. Reference number is : B1TRUT9Y . Sentence7: Unfortunately there are no restaurants that match that description. Could you like to try other food types? Sentence8: I would prefer expensive and I'm looking to reserve a table for 1 at 17:00 on Sunday, please. Sentence9: There are 44 attractions that fit your criteria. Are you looking to visit a specific type of attraction? Sentence10: Cambridge University Botanic Gardens is located in town centre. Would you like more information? Sentence11: It is a red honda, and their phone number is 07330545456 Sentence12: I can get those reservations for you at la mimosa. Would you like me to make the reservation? Sentence13: Okay, would 16:00 be a better time on Sunday? Sentence14: I'm looking for an attraction in the centre of town. Sentence15: No, thanks for helping. Goodbye! Sentence16: Yes, I need a table for 1 at 17:00 on Sunday. Sentence17: Yes, may I have their phone number please? I'd also love to eat at a Malaysian place near the park. Any ideas? Sentence18: I have confirmed that the taxi will arrive at La Mimosa at 16:00. Is there anything else I can help you with today? Sentence19: Unfortunately, that time slot is unavailable. Can I try a different time for you? Sentence20: Correct. Everything is set. Sentence21: Hi, I would love to try a Mediterranean restaurant. Do you have any suggestions? Sentence22: ok, that's all I needed, thank you. Sentence23: Can you confirm the time that taxi was booked? I need it to arrive at the restaurant by 16:00. Sentence24: I just need to know what type of car you booked for the taxi. Sentence25: There are three options, the gardenia which is cheap in price range, along with la mimosa and shiraz restaurant which is expensive. Ant preference? Sentence26: I would like to book a taxi to commute between the two places. Question: Who has spoken the sentence 18? (A) User (B) System
Output: Answer: (A) User