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

Sentence1: I have the TR4849 train leaving Ely at 13:35 on Monday. Sentence2: How about cityroomz? It is located in the centre of the city, is moderately priced, has 0 stars, and has free wifi. I think it would be perfect ofor you! Sentence3: Perfect, could you also assist me in finding a place to stay? Sentence4: What will be my arrival time in Cambridge and what is the ticket price, please? Sentence5: You're welcome. Have a great day. Good bye. Sentence6: You are booked and your reference number is QUJQMRK7 . Can I help you with anything else? Sentence7: That is everything, thank you for your help. Sentence8: From where will you be departing? Sentence9: I'm looking for a train that goes to cambridge, leaving after 12:30 on monday Sentence10: I am leaving from Ely. Sentence11: Oh I'm not picky on the area. I definitely need free wifi, moderate price, and 0 stars though. Sentence12: That's perfect I need it booked for 8 people for 5 nights starting on Monday. Sentence13: I sure can. What area would you like to stay? Sentence14: The price is 4.40 pounds. You will arrive at 13:52. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: Yes, please book this. Sentence2: I found 4 restaurants, would you like to try Cotto? Sentence3: Thank you, can I also get a train leaving petterborough and arriving by 11:15 Sentence4: That's all I need, Thank You. Sentence5: Sure, can you try to get a table for 8 people at 17:00 on Tuesday? Sentence6: Okay... how about British food? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : IAUXALYD . Sentence8: I just need to make sure I arrive in cambridge by 11:15 please. Sentence9: I would like to try Jamaican food. Sentence10: Unfortunately I can't find any Jamaican restaurants. Is there another type of food you'd like to try? Sentence11: Absolutely. How many tickets would you like to be booked? Sentence12: There are 21 different restaurants in that area matching your price range. What kind of food are you in the mood for? Sentence13: I'm looking for a moderately priced restaurant in the center of town. Sentence14: Sure thing! The reference number is S4FM08GE . See you! Sentence15: There is a train that leaves at 10:19 and arrives at 11:09. Would you like to book it? Sentence16: there are eleven trains that match that criteria. What time would you like your departure time to be? Sentence17: Yes, Tuesday, the same day as the restaurant booking, can I please get a departure time as well? Sentence18: Before going further I would just like to confirm you'd be leaving on Tuesday, is that correct? Question: Who has spoken the sentence 16? (A) User (B) System
Answer: (A) User

Sentence1: Thank you very much! Sentence2: You are most welcome! Sentence3: I can't leave until after 16:30, please. Sentence4: I would like to book a taxi to the gandhi. Sentence5: I want to be picked up at prezzo please Sentence6: I'll need a little more information to find you a taxi. What time would you like to arrive at the ghandi? Sentence7: I can help you book that, first I'll need to know where you'd like picked up at. Sentence8: Okay, I've got a grey ford with the contact number 07766078886. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System