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: i am sorry. i have double checked and still do not find anything matching your criteria. would you like a different star rating? Sentence2: I can help with that. What kind of price range do you have in mind? Sentence3: there are a variety of good things in the north it depends on what you want i will find whatever you request Sentence4: There doesn't appear to be a 4 star hotel with wifi in the north. Can I interest you in a lower star rating? Sentence5: i need a hotel with wifi in the north part of town Sentence6: Perhaps there is a guestroom? Sentence7: No but would you like to try another location ? Sentence8: No, the hotel needs to have a 4 star rating. Can you please check your system again? Thanks Sentence9: I am open as far as price range, but I would love a 4 star place. Sentence10: No I need the north. Is there anything else available in the north? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: No need for a booking, right now. Could you tell me the arrival time? Sentence2: Is there a train I can take from cambridge that leaves after 18:15? Sentence3: it is located in sleeperz hotel, station road Sentence4: No, but I do need free parking and wifi. Also, are there any 0-star places? I'm feeling adventurous. Sentence5: Thank you for contacting the Cambridge TownInfo centre. Goodbye Sentence6: Could you book it for 3 people and 4 nights starting Wednesday? Sentence7: Do you have a specific area in mind? Sentence8: Please give me the correct area of town. Sentence9: the arrival time is 20:06 Sentence10: The TR1006 leaves at 19:00. Would that work? Sentence11: Great, thanks so much, that's all I need! Have a great day! Sentence12: cityroomz is a moderately priced 0 star, but they don't provide parking. It's in a totally sketchy area called Sleeperz. Want to give it a shot? Sentence13: I would like to leave on Sunday and go Leicester. Sentence14: Sure. The TR9517 leaves at 18:21 on Sunday for Leicester. Would you like me to book it? Sentence15: Booking was successful starting wed. Reference number is : N18DU4NR . CityRoomz, sleeperz hotel, station road, cb12tz. Sentence16: I also need a place to stay in the moderate price range. Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User