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

Input: Consider Input: Sentence1: Thank you for your help. Sentence2: do you have one with a star of 4? Sentence3: You're welcome, and have a great day. Sentence4: yes please tyhat you for all your help Sentence5: OK, you have 7 tickets reserved on TR6939. Total due at the station will be 116.2GBP. Your reference number is OK7WYTNQ . Sentence6: Try either one of the cheap ones, I need one that can hold my group of 7 for 5 nights on tuesday. Sentence7: Yes, I'll need 7 tickets. Sentence8: I also need a place to stay. 2 star is my preference. Sentence9: I would like to arrive in Cambridge by 08:45. Sentence10: We have 10 different trains on that day. Do you prefer a particular time? Sentence11: No, thank you. That will be all. Sentence12: TR6939 is your best option. It will leave at 05:39 and arrive at 07:07. Would you like to book passage on that train? Sentence13: In the west part of town. The price doesn't matter. Sentence14: the cambridge belfry was the best match for a large group so I booked you there, the reference number is X33MYBK5 , may I assist with anything else? Sentence15: Have a great time. Sentence16: I do. We have three options. Two that are cheap and one that's expensive. Do you have a preference? Sentence17: I need help finding a train. Can you do that? Sentence18: I don't have any 2 star hotels in that area. Would you like a different area or a higher rated hotel? Sentence19: Okay, do you need a reference number? Sentence20: Of course. Where are you traveling to? Sentence21: I would like to leave Liverpool street on Tuesday and arrive in Cambridge. Sentence22: okay, what area and price range? Question: Who has spoken the sentence 15? (A) User (B) System

Output: Answer: (B) System


Input: Consider Input: Sentence1: Can I get some information about visiting Great Saint Mary's Church? Sentence2: Thanks. I am also looking for an expensive place to eat in the centre. Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : XWZ8N8GF . Anything else I can do? Sentence4: Sure, there are plenty of places in the area. Did you have a particular type of cuisine in mind? Sentence5: Sure, is there anything specific you'd like to know? Sentence6: What is the entrance fee for that attraction? Sentence7: This is found in the center of town. Their phone number is 01223350914 and their postcode is cb23pq. Sentence8: Admission to Great Saint Mary's Church is 2 pounds. Sentence9: Definitely, Please book me for 7 people at 14:45 on wednesday. I also would like the reference number. Sentence10: No, just expensive in the centre. Recommend one for me. Sentence11: Thanks! That's all I needed. Sentence12: I'd really like to visit Great Saint Mary's Church. Could you give me some information about it? Sentence13: You should try dining at kymmoy, an asian oriental restaurant located at 52 Mill Road City Centre. Would you be interested in booking a table? Sentence14: You're welcome! Have a wonderful day. Question: Who has spoken the sentence 12? (A) User (B) System

Output: Answer: (A) User


Input: Consider Input: Sentence1: There are two in the area. One is cheap and the other is moderately priced. Do you have a preference? Sentence2: How about a thai place then? Sentence3: sala thong is just for you. Their address is 35 Newnham Road Newnham. Do you need a reservation? Sentence4: The postal code is cb39ey. Is there any other thing you might like to know? Sentence5: I don't have a Basque restaurant on the West side. Would you like me to look in other parts of town? Sentence6: No I do not I would like a 4 star guesthouse in the west with free parking. Sentence7: We don't have any Basque restaurants on the west side, regardless of price. Do you want to try a different type of food? Sentence8: Do you have a price preference? Sentence9: Well how about an expensive one then? Sentence10: No, thank you. I would like to know the postcode, if possible? Sentence11: Yes, I need a guesthouse close to the restaurant on the west side. Sentence12: I'm looking for a restaurant on the west side that serves basque food. Sentence13: I would like a 4 star guesthouse with free parking. Sentence14: gdsgfsd fg dsf gdfg d sfgds Question: Who has spoken the sentence 2? (A) User (B) System


Output: Answer: (A) User