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

Example Input: Sentence1: yes, it is perfect Sentence2: Alright, there about 30 or so hotels that would work. Did you prefer a certain area or price range? Sentence3: It's booked. Reference number is 6JC8SK3S . Your taxi will arrive at 11 it's a red skoda with contact number 07950328037 Sentence4: The guesthouse has 4 stars. The address is 154 chesteron road. The phone number is 01223353888. Would you like for me to book it? Sentence5: I am looking for a place with free parking, Internet is not required. Sentence6: There really isn't any particular star rating I'm interested in. Sentence7: Thank you. Will it take more than 15 minutes to get from the hotel to the restaurant? Sentence8: How does the copper kettle sound? It is moderately priced in town centre and serves british food. Can I reserve a table for you? Sentence9: I'll book the hotel myself, but I would like a restaurant reservation. Someplace moderately priced in the center of town. Sentence10: May I suggest the Acorn Guest House? It's moderately-priced in the north. Sentence11: There are 21 moderately priced restaurants near the centre. Do you have a type of cuisine in mind? Sentence12: There will be 8 of us and I am also looking for a moderate priced restaurant in the center for 11:15 on Saturday. Please send me the reference number. Sentence13: Not really, but a moderate priced restaurant in the centre would be ideal. Sentence14: alright, that narrowed the results down to 21 guesthouses. is there a star rating you are particularly interested in? Sentence15: No. I believe that will be everything. Thank you. Sentence16: Thank you and please contact us again if you have any questions. Sentence17: Please tell me its star rating, phone number and address. Sentence18: What day will you be arriving? I also need to know how many people there will be and how long you will be staying. Sentence19: That's fine. Could you book a table for 8 people at 11:15. I need a reference number. I also need a taxi between both places arriving at the booked time. Sentence20: I don't really have an area or price range in mind at the moment, but I am looking for a place that's a guesthouse. Sentence21: Let's get your hotel booked first. I will need to know how many days you'd like to stay and what day you want to begin your stay please. Sentence22: No, your departure is at 11:00 and you will arive by 11:15. Is there anything else I can assist with you today? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: there are 11 all with free entrance. Would you like me to recommend one? Sentence2: As previously mentioned, they both have internet available. I don't have specifications about the internet service however. Would you like to book one of these? Sentence3: I can, we have 9 hotels, do you have anything else to narrow it down? Sentence4: Your white ford taxi booking was successful. Its contact number is 07580691974. Sentence5: I have 2 available hotels. One is the Gonville Hotel located on Gonville Place. The other is University Arms Hotel on Regent Street. Which one would you like to book? Sentence6: Do you have there phone number? Sentence7: Your booking was successful and the reference number is ELYPAXQZ . Sentence8: I want to arrive at the Castle Galleries by 11:15. Sentence9: Yes, please book for two nights beginning on Sunday for one person. Sentence10: Yes, please. Can I get the address and phone number for the one you reccommend? Sentence11: Ok, thank you for the help. Sentence12: I'm looking for a hotel, can you help? Sentence13: Can you book the one without wifi? Sentence14: Their phone is 01223307402. Is there anything else I can help you with today? Sentence15: What time do you need the taxi, and which is the destination site? Sentence16: Was there anything else you needed today? Sentence17: Yes, I also need a taxi going between the two places. Sentence18: they both have internet, for what days and how many people should I book? Sentence19: Do either of them offer free wifi? Sentence20: castle galleries is a nice place, their address is unit su43 grande arcade st andrews st and their postcode is cb23bj, anything else today? Sentence21: Thank you. I'm also looking for a museum to go to in the same area. Sentence22: It should be in the centre and be on the expensive side. Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Your booking was successful. Your table will be reserved for 15 minutes. The reference number is 0MRW9QAM . Sentence2: Can you please make a reservation for me? It needs to be for 3 people at 14:45 on Friday. Sentence3: Tell me where your departure and destination sites will be. Sentence4: Is there anything else I can assist you with today? Sentence5: We are wanting to save money for the rest of the sights in town, so let's go with the cheaper one. Can you tell me about it? Sentence6: Sweet, that's all I need today. Sentence7: What is the address and postcode of the park? Sentence8: Thank you very much. Sentence9: Yeah, I also wanted to find a park to visit in the north. Sentence10: milton country park is in the north and it is free to visit. Sentence11: I am showing 2. The nirala which is moderate priced and the royal spice which is cheap. Would you like to book one of them? Sentence12: Milton country park is located at milton country park, milton, postcode cb46az, phone 01223420060. Is there anything else you need today? Sentence13: Sure, the Royal Spice is located on Victoria Avenue, Chesteron and the post code is cb41eh. Sentence14: I need a taxi from the park going to the restaurant. I'd like to arrive before my dinner reservation, if at all possible. Sentence15: Can I help you with anything else? Sentence16: I also need a taxi between the two. Sentence17: That's great thank you! Sentence18: Wonderful! Thanks for contacting the cambridge towninfo centre and take care! Sentence19: Booking completed! Booked car type : black audi Contact number : 07283412603 Sentence20: i am looking for a place to eat. The restaurant should be in the north and should serve indian food. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User