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 have information for the Parkside Police Station, is this close to your location? Sentence2: You're welcome. The police will help you immediately. Goodbye. Sentence3: Thank you for your help Sentence4: Please put me in touch with the local police, I was just robbed. Sentence5: The phone number is 01223358966 and the post code is CB11JG. Sentence6: I don't know, could you just give me the postcode and phone? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you so much. That is all I will need today. Sentence2: Great, how many tickets would you like to purchase? Sentence3: That would be perfect! Sentence4: I am looking to go from cambridge, and go on friday arriving by 14:30 Sentence5: Okay, how about the TR5901 leaving at 13:34 and arriving at 14:24 with a duration of 50 minutes? The cost is 16.50 pounds. Would that work for you? Sentence6: There are 266 trains going to Peterborough. Can you give me a departure day and time so that I can narrow down your choices? Sentence7: Your tickets are all booked, reference number R5P65TW5 Sentence8: I'd like to find a train to peterborough. Sentence9: Thank you for contacting Cambridge TownInfo centre. Have a wonderful day! Sentence10: 7 tickets please. Can I also have the reference number for the booking? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Great. Thank you for your help! Sentence2: Hi, I'm looking for a train from Cambridge that arrives by 17:45. Sentence3: TR5154 LEAVES AT 05: 59 SHOULD I BOOK IT FOR YOU? Sentence4: Going to london liverpool street from cambridge. I need to arrive by 17:45. Sentence5: Is there anything else I can help you with? Sentence6: I would like to arrive by 17:45 Sentence7: What do and time and do want to leave? Sentence8: How long is the trip on the TR5154? Sentence9: Each train on that route makes the run in 88 minutes. Sentence10: That is all I need. Sentence11: Great! Should you need anything else, please let us know. Sentence12: Where will you be going? Sentence13: Sure, there's club salsa in the centre, their phone number is 07782218745 and the entrance fee is 5 pounds. Sentence14: Excellent. I need to a nightclub in the centre as well. Question: Who has spoken the sentence 10? (A) User (B) System
Example Output:
Answer: (A) User