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: I am looking for Mediterranean food in the center of the city. Sentence2: I show 3 available. 2 are in the expensive range and 1 is cheap. May I book a table for you? Sentence3: Thanks for calling. You have a great day! Sentence4: I have booked you at the Shiraz Restaurant for 7 people Saturday at 15:45. Your table will be reserved for 15 minutes. Sentence5: I'd like the expensive range and I'd like to book a table for 7 people on Saturday at 15:45. Sentence6: Great. Thanks so much! Sentence7: Thank you so much. That is all I need today. Have a great evening. Sentence8: Sure. Your reference number is MSV3UPS2 . You will likely need it. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I recommend train TR6034. The cost is 30.24 pounds and it will get you there by 20:06. Would you like me to book it for you? Sentence2: I also need a train on saturday that departs from cambridge. Sentence3: What is your destination? Sentence4: Thank you and have a great day. Sentence5: I'm heading to Leicester. I need to get there by 21:00. Sentence6: All 8 have free parking. If you're looking for a guesthouse, might I suggest alexander bed and breakfast? Sentence7: Sure, the Allenbell is a guesthouse with free internet. The phone number is 01223210353. Can I be of further assistance? Sentence8: I need a cheap four star room. Sentence9: That is all I need, thank you. Sentence10: Booking for TR6034 was successful for one person. Your total fee is 30.24 GBP payable at the station and your reference number is A1E9MYGC . Sentence11: There are 7 guesthouses and 1 hotel meeting your needs. Do you have an area preference? Sentence12: No but I need it to include free parking. Sentence13: Yes, they sure do. Do you prefer a hotel, or a guesthouse? Sentence14: Can you suggest one for me? I need the hotel type, phone number, and whether it has internet or not. Sentence15: If I could get the train that arrives closest to 21:00 please. Sentence16: Yes that would be great if you could book train TR6034 for me. Thank you. Sentence17: We have 15 trains going to leicester from cambridge arriving by 21:00. Was there a certain time you wanted to leave at? Sentence18: Do all 8 places have the internet? Question: Who has spoken the sentence 11? (A) User (B) System
Example Output:
Answer: (B) System