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

[Q]: Sentence1: Booked! You leave at 13:17, your reference number is 3WICPFQP, you will pay 141.6 at the station. Sentence2: I am looking to book a train. Sentence3: Could you tell me your location, which area of town or what business you are departing from? Sentence4: Certainly. May I ask where you want to depart from? Sentence5: I need to depart from London Kings Cross and go to Cambridge. Sentence6: We are leaving London Kings Cross and need to do so after 12:45 on Friday for 6 people and can I get the reference number for the booking? Sentence7: Okay thank you. That is all I need. Sentence8: Okay thank you for calling. Sentence9: I would like to leave from the closest station to my location. Sentence10: To clarify, are you looking for a train to Cambridge? All Friday trains from London Kings Cross go to Cambridge. Question: Who has spoken the sentence 8? (A) User (B) System
[A]: Answer: (A) User

[Q]: 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
[A]: Answer: (B) System

[Q]: Sentence1: Your booking was successful. Your table will be reserved for 15 minutes. The reference number is 0MRW9QAM . Sentence2: Can you please make a reservation for me? It needs to be for 3 people at 14:45 on Friday. Sentence3: Tell me where your departure and destination sites will be. Sentence4: Is there anything else I can assist you with today? Sentence5: We are wanting to save money for the rest of the sights in town, so let's go with the cheaper one. Can you tell me about it? Sentence6: Sweet, that's all I need today. Sentence7: What is the address and postcode of the park? Sentence8: Thank you very much. Sentence9: Yeah, I also wanted to find a park to visit in the north. Sentence10: milton country park is in the north and it is free to visit. Sentence11: I am showing 2. The nirala which is moderate priced and the royal spice which is cheap. Would you like to book one of them? Sentence12: Milton country park is located at milton country park, milton, postcode cb46az, phone 01223420060. Is there anything else you need today? Sentence13: Sure, the Royal Spice is located on Victoria Avenue, Chesteron and the post code is cb41eh. Sentence14: I need a taxi from the park going to the restaurant. I'd like to arrive before my dinner reservation, if at all possible. Sentence15: Can I help you with anything else? Sentence16: I also need a taxi between the two. Sentence17: That's great thank you! Sentence18: Wonderful! Thanks for contacting the cambridge towninfo centre and take care! Sentence19: Booking completed! Booked car type : black audi Contact number : 07283412603 Sentence20: i am looking for a place to eat. The restaurant should be in the north and should serve indian food. Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User