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: Enjoy your travels! Let us know if we can be of any further assistance. Sentence2: TR8143 departs at 14:11 and arrives in Cambridge by 14:58, does this suit your needs? Sentence3: I need a train leaving from kings lynn. Sentence4: Yes, I'd like to travel on Wednesday, and I'd like to arrive in Cambridge no later than 15:30. Sentence5: There are no nightclubs in the west. Would you like to try another area? Sentence6: There are 133 trains leaving Kings Lynn, do you have a particular day you are traveling? Sentence7: They have free entrance. Their postcode is cb30ds. Sentence8: Could you look up a college instead then? Sentence9: I'm glad I could help. Sentence10: Churchill college is located in the west part of town. Sentence11: Yes it does. Can you verify the total travel time and price? Sentence12: Thank you goodbye. Sentence13: Thanks a lot, that's all. Sentence14: Sure - the travel time is 47 minutes, and the fee is 9.80GBP per ticket. Sentence15: I also need a nightclub in the west. Sentence16: Could you get me the postcode and entrance fee for there? Question: Who has spoken the sentence 9? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: I believe that's all I need. Thanks! Sentence2: It is an expensive restaurant on the west side of town. Would you like me to reserve a table for you? Sentence3: Yes I have many options for you. How about the Tandoori Palace? Sentence4: I'm looking for an Indian restaurant in the west. Sentence5: That might work. What is the price range of Tandoori Palace? Sentence6: Sure, it is located at 68 Histon Road Chesterton in the cb43le post code. Can I help with anything else today? Sentence7: You are welcome. Have a nice day. Bye. Sentence8: No that's OK, but could you give me their address and postcode please. Question: Who has spoken the sentence 1? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: Yes, that will work. Can you book that train for 8 people? I will also need a reference number. Sentence2: Certainly. Could you tell me where you're departing from and traveling to? Sentence3: Great! Thanks, that's all I need. Sentence4: I need to find a train that arrives at 12:30 on Wednesday. Sentence5: The TR3543 puts you into Cambridge at 12:23. Will that train work for you? Sentence6: Thank you! Have a great day! Sentence7: I am departing from Birmingham new street and going to Cambridge. Sentence8: Certainly. I have you booked and your reference number is 47MBURBC . Sentence9: Thank you for all of your help! Sentence10: Yes I need to arrive in Cambridge by 12:30 please. Sentence11: Have a great day! Sentence12: I have seven trains available then, could you tell me what time you would like to leave ? Question: Who has spoken the sentence 7? (A) User (B) System
Output: Answer: (B) System