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

Ex Input:
Sentence1: Cambridge artworks is wonderful! They are located at 5 greens road cb13ef. There phone number is 01223902168. Sentence2: Yes, there are 4 museums. Three are free and one has a 5 pound entrance fee. Are you looking for a gallery? Sentence3: What do you recommend? Sentence4: Can you help me find a place to go in the east? Sentence5: Thank you. That's all I needed. Sentence6: I'm also looking for a place to eat. I don't mind where, but I want an expensive chinese place. Sentence7: Ok. I booked a taxi for you. It is a blue audi and the contact number is 07155610417. Sentence8: You're welcome, goodbye! Sentence9: A recommendation would be fine. Can I get the area they're in and post code? Sentence10: I'd also like to book a taxi between the two places. I'd like to leave the restaurant by 2:30 Sentence11: There are 9 options that fit your criteria. Would you like a recommendation or would you like to narrow it down further? Sentence12: We have 5 very nice attractions in the east, do you have an idea of type of activity that would best match your needs? Sentence13: I recommend yu garden. It is located in the east. The address is 529 Newmarket Road Fen Ditton. Postcode cb58pa. Sentence14: Is there a museum I could go to on that side of town? If so, please provide phone number, address, and postcode. Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
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

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: the train id is TR0335. Booking was successful, the total fee is 189 GBP payable at the station . Reference number is : 13V7H457 . Sentence2: Pizza Express is a great place that serves moderately priced Italian in the city centre. Would you like me to make you a reservation? Sentence3: Perhaps the center? But I don;t think I have a preference. Sentence4: Thanks that's all I need today Sentence5: No. How about Italian food? Sentence6: I was able to book for you. Do you need a reference number? Sentence7: What day do you need to leave? Sentence8: Sure. There are five moderately priced italian restaurants. Would you prefer a certain part of town? Sentence9: There are 5 different trains on that day. Would you like me to book one of them? Sentence10: Yes please. I just need tickets for all 5 of us. as close to 18:30 as possible. Sentence11: Can you help me find a moderately priced restaurant that serves North American food? Thanks. Sentence12: Thank you for contacting us and have a great day. Sentence13: Yes, I do need it. I'm also looking for a train that goes to Leicester after 18:30. Is there anything available? Sentence14: Yes. Please reserve for 5 people on Sunday at 15:00. Sentence15: I need to leave on monday and depart from cambridge. Sentence16: Unfortunately, I am unable to locate a moderately priced North American restaurant. I did find an expensive one, would you be interested in that? Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User