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

Example Input: Sentence1: Alright. Enjoy your stay in Cambridge! Sentence2: Thank you. Have a great day. Sentence3: The train that arrives closest to 16:45 is best. I just need to know what time it leaves and arrives. Oh and of course it's ID. Sentence4: Yes. I am looking for a place to go in the west part of town. With preference to college. Sentence5: There are 6 days that arrive before 16:45 on this day. Did you have any other preferences? Sentence6: I am looking for information in Cambridge. I need a train ticket. Can you help? Sentence7: In the west part of town Clare College. The entrance fee is 2.50 pounds. Sentence8: Great that's all the information I need! Sentence9: Certainly. What is your departure location and your arrival location? Sentence10: It has been my pleasure. Feel free to contact us with any other questions you may have in the future. Sentence11: I would like to depart from London Liverpool Street and arrive in Cambridge. I would like to leave Sunday and arrive by 16:45? Sentence12: Of course! That will be TR6578 leaving at 13:39 and arriving at 15:07. The price is 13.28 pounds and it's an 88 minute duration. May I help with anything else? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: What area would you like to stay in? Sentence2: I need it for 7 people. 5 nights starting Sunday. Sentence3: Which of the 2 hotels should I book for you? Sentence4: Are there any amenities that you are looking for? Parking? Internet? Sentence5: TR2021 is leaving at 20:24 would that work for you? Sentence6: I don't really have a preference for area. But I would like it to be a hotel rather than a guesthouse. And I would love free parking. Sentence7: I'd like free parking. Sentence8: How about the Ashley Hotel? Sentence9: Booking was successful, the total fee is 56.56 GBP payable at the station . Reference number is : EZIAXWCQ . Can I help you with anything else? Sentence10: Great! I'm glad I could be of help. Have a good day. Sentence11: We have ashley hotel and lovell lodge, shall I book you for one of the two? Sentence12: I am also looking for a train departing from stansted airport going to cambridge on sunday. I need to leave after 19:30. Sentence13: I'm looking for a place to stay in Cambridge, moderate price for a hotel. Sentence14: Yes, please make a booking for my group. We'll all be traveling together. Sentence15: Thank you that is all I needed today. Sentence16: Booking was successful. Reference number is L1S8JNAC . Do you need anything else? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I have the gonville and the lensfield hotels. When would you like the room? Sentence2: Could you find me one with a star rating of 3? Sentence3: Sure, there is one in the centre area and one in the south. Do you have a preference? Sentence4: Okay no problem. I have booked you at the gonville hotel for 4 nights starting friday. The reference number is 7KJDALDO . Can I help with anything else? Sentence5: Ali Baba is a moderately priced labanese restaurant in the centre. Would you like to make a reservation? Sentence6: Yes, I also need a Lebanese restaurant in the center of town. Sentence7: Doesn't matter. I also need free parking. Sentence8: I can't wait. Please book a table for 1 at 13:00 on Friday, please. Sentence9: gonville hotel hotel centre expensive 3 yes yes 01223366611 cb11ly gonville place the lensfield hotel hotel south expensive 3 yes yes 01223355017 cb21en 53-57 lensfield road Sentence10: Booking was successful. The table will be reserved for 15 minutes. Reference number is : JVL68LSJ . Anything else I can help with? Sentence11: Have a great day. Good day. Sentence12: That is everything, thank you. Sentence13: Yes can you please and send me the info? Sentence14: No area does not matter please recommend one. Sentence15: I need a hotel with free wifi. Sentence16: It seems we are on different pages here. Ok, just please book a room for at the Gonville Hotel, 1 person, 4 nights, starting Friday. Sentence17: What part of town are you planning to stay in? Sentence18: There are eight results. Is there a certain price range you'd like? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output:
Answer: (B) System