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

Sentence1: How many tickets please Sentence2: I want to go to Cambridge on Wednesday. Sentence3: I can give you all kinds of information as well as book a ticket. Where are you going and when? Sentence4: Have a great stay in town. Goodbye. Sentence5: Train TR9741 arrives at 07:52 and I have booked you for 2,here is your information:Booking was successful, the total fee is 8.8 GBP payable at the station . Reference number is : U44P6DQP . Sentence6: I want you to book it for 5 nights, starting wednesday. 2 people. Sentence7: Where will you leave from? Sentence8: Sure thing, what kind of information do you need? Sentence9: Nope, that's all I need today. Thanks for all your help. Goodbye! Sentence10: Okay that booking was successful. Your reference number is 2VD26230 . Anything else I can do for you? Sentence11: I am looking for information and would appreciate the help. Can you help with a train? Sentence12: Would you like to specify a departure or arrival time? Sentence13: I would need 2 tickets. Sentence14: Can you also look up the hotel Carolina Bed and breakfast? Sentence15: I will be leaving from ely. Sentence16: I need to arrive by 08:45 Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: Sounds good. Have a good day. Sentence2: Thank you very much. I will contact them now. Sentence3: Can you give me the contact info for the nearest police station? Sentence4: Sure! The Parkside Police Station is located at Parkside, Cambridge and can be reached at 01223358966. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: The Addenbrookes Hospital is located at Hills Rd, Cambridge. Sentence2: You are welcome, have a nice day. Sentence3: i want to find a hospital in town Sentence4: Thank you goodbye. Question: Who has spoken the sentence 1? (A) User (B) System

Answer: (B) System