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, where would you like to go to? Sentence2: Is there an area you'd prefer to stay in? Sentence3: Yes, book that one please. Sentence4: No free parking is not necessary. Sentence5: I prefer a moderate price one. Sentence6: Your room is reserved, ref# UCVH6QPU . Is there anything else I can help you with today? Sentence7: Would you help me book a train for Thursday, please? Sentence8: Can I get the reference number for that booking? Sentence9: There are over 200 trains going to Cambridge on Thursday. Where will you be departing from? Sentence10: Your booking was successful. Your reference number is Z3NAOPSY . Sentence11: Is that for 2 people? And I need it for 5 nights starting thursday. Sentence12: I would like a cheaper hotel. Sentence13: I would like to go to Cambridge Sentence14: That narrows us down to about 19 trains. Do you have a time you would like to leave after or arrive by? Sentence15: Ok I Am going to book a cheaper hotel for you ,have a good day,thank you. Sentence16: There is nothing in the price range you mentioned. Would you be willing to stay at a cheap hotel or an expensive hotel? Sentence17: Not that's it. Thank you so much! Sentence18: In the east. With free wifi, please. Sentence19: Do you need free parking? Sentence20: I would like to leave after 15:45. Sentence21: Yes, please. I am also looking for a place to stay, ideally a hotel with a 4 star rating in the moderate price range. Sentence22: Then in that case, I recommend the TR0209 which departs from Kings Lynn at 16:11 and gets into Cambridge at 16:58. Would you like me to book it for you? Sentence23: I'm sorry, let's get your hotel choice fixed first. There is one cheap hotel - The Cambridge Belfry. It has free internet and parking. Can I book this one for you? Sentence24: I found 3 guesthouses matching that criteria, I would recommend the Carolina Bed and Breakfast. Located in the east, 4 stars, and has free wifi. Will this one work? Sentence25: I will be leaving from Kings Lynn. Sentence26: Ok. Thank you for choosing Cambridge Towninfo Centre. We hope you enjoy your stay. Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: There are lots of local attractions, are you interested in architecture? Sentence2: No thank you. That will be everything I need today. You have a nice day. Sentence3: You're welcome! Have a nice day. Goodbye. Sentence4: I have confirmed a taxi picking you up at backstreet bistro at 24:45. The contact number is 07972785913. A blue volkswagen will pick you up. Can I help with anything else? Sentence5: Yes sure as long as the attraction is in the city center. Could you also provide me with the phone number and postcode of the attraction? Sentence6: Sure. I also need somewhere to eat. I'm thinking something on the expensive side and close to the college. Sentence7: Backstreet bistro is located in town centre. The address is 2 Sturton Street City Centre, phone 01223306306. Do you need any further assistance? Sentence8: Can I get one in the centre of town and looking for gastropub food. Sentence9: Of course. How about Saint Catharine's College, in postcode cb21rl? Phone is 01223338300. Sentence10: Backstreet Bistro is an expensive restaurant in the centre of town that serves gastropub food. Would you like more information or to make a reservation? Sentence11: Alright, there are 33 different restaurants around the college that are expensive. Is there a type of food you are looking for? Sentence12: Hi, I'm planning a trip to Cambridge and would like a few ideas on places to go for fun. Sentence13: Information, please! I'm not looking to make a booking at the moment. Sentence14: Yes, can you book a taxi between the two? I would like to leave the restaurant by 24:45. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you goodbye Sentence2: Thank you for allowing me to help you today. Sentence3: The nearest hospital is located in Hills Rd, Cambridge. Sentence4: Let me also have the postcode and telephone number, please. Sentence5: Am injured and are looking for a hospital nearby Sentence6: Sure the phone number is 01223245151 and the post code is CBQ022. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System