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

[Q]: Sentence1: I'm leaving from Cambridge and going to Birmingham New Street. Sentence2: There appear to be hourly trains from 05:01 to 23:01. Do you know what day and time you'd like to travel? Sentence3: You are welcome. Have a great trip. Bye. Sentence4: Wednesday and it should leave after 18:00. Sentence5: Can you also direct me to some attractions in town in the east? Sentence6: Ok, I have booked you 3 seats on that train. Your reference number is MI5RMEHQ . You'll need to pay 225.3 GBP at the station. Anything else I can do? Sentence7: That sounds good. Can you book that for me for 3 people? Sentence8: I'm planning my trip there, but need to find a train for when I depart. Could you help me with that? Sentence9: The TR1766 leaves at 18:01 and arrives at Birmingham new street at 20:44. Would that be OK? Sentence10: The address is 5 greens road and the phone is 01223902168. Is there anything else that i can do for you? Sentence11: That would be perfect. Can you give me the address and the phone number? Sentence12: Sure. From where will you be departing, and what is your destination? Sentence13: No, that is all. Thanks for your help. Sentence14: Of course! There are several attractions in the east. I'd suggest Cambridge Artworks; it's a museum with free entrance. Would that work for you? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: No thank you. You have helped tremendously. Sentence2: What is the address and postcode, please? Sentence3: Can you help me? I was in a car accident dispute. Sentence4: The Parkside Police Station's phone number is 01223358966 Sentence5: you are welcome Sentence6: The address is Parkside and the postcode is CB11JG. Can I help you with anything else? Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Please book a table for 8 people at 14:15 on Tuesday. Sentence2: I will book that for you now. Sentence3: no, i want one of those two restaurants. Sentence4: Both restaurants are cheap, if you are interested in a more expensive restaurant would you like me to check a different type of food? Sentence5: nandos is definitely going to be the cheapest. It's the south side and I can get you a reservation there if you want. Sentence6: Do you need help finding attractions or booking a taxi? I can assist you. Sentence7: You're welcome. Have a great day! Sentence8: Okay let's find one for you. I've got two in town. One's in the south and one is in the centre. Both are nandos locations. Sentence9: No that is it. Thank you. Sentence10: Booking was successful, the total fee is 140.8 GBP payable at the station . Reference number is : BMSH4XDW . Anything else? Sentence11: I can put you on the tr0627 it will get there a little early at 9:55, how many tickets would you like? Sentence12: Your reference number is : CE5BU114 . What else can I help you with? Sentence13: Yes, please set a reservation for me. Sentence14: i am leaving from norwich and going to cambridge. Sentence15: Where will you be departing? And where is your destination? Sentence16: I don't have a preference for location but it does need to be cheap. Sentence17: Ok thank you for your help and I need a reference number Sentence18: same group of 8 people. Sentence19: I need finding a Portuguese restaurant Sentence20: What day and time do you want to make the reservation? Also, how many people are in your party? Sentence21: That is all thanks. Sentence22: I also need a train for Tuesday that arrives by 10:45. Question: Who has spoken the sentence 15? (A) User (B) System
[A]:
Answer: (B) System