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: I do not care about the area but I would like it to be expensive. Sentence2: How about the Gonville Hotel which is centrally located? It has internet and is expensive. Sentence3: I found 5 hotels matching your request. I would recommend Huntingdon Marriott Hotel located in the west. It has a 4 star rating. Sentence4: Will you be needing a reference number? Sentence5: On what day will you be checking in? Sentence6: 4 people will be staying Sentence7: I also need a place to stay? Sentence8: Your table will be reserved for 15 minutes. Your reference number is GDZZ5T1Y . Can I assist you further? Sentence9: That is all, thanks. Sentence10: Booking was successful. Reference number is : M6FRXJOV . Sentence11: I have many to choose from. Do you have a preference for internet or parking? Sentence12: Alright! How many people will be staying starting what day? Sentence13: There are 11 European style restaurants. What price ranges are you looking for? Sentence14: Yes, I would like it to have internet. Sentence15: That sounds perfect. Let's book it. Sentence16: There are 33 hotels to choose from. Can we narrow this down? Are you interested in a particular part of town or specific price range? Sentence17: Expensive price range. Please book it for 4 people at 18:15 on Monday Sentence18: Can you help me find some european food in Cambridge? Sentence19: How about price range? The hotel should also be very expensive. I won't settle for less and neither will Fi-Fi. Sentence20: I will be staying on Monday. Sentence21: Yes I will definitely need that. Sentence22: Great. If you need help in the future, please contact us. Enjoy your stay. Question: Who has spoken the sentence 16? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: I'll take whichever one you recommend. I just need the phone number, postcode & address please. Sentence2: TR7786 will leave at 17:00, would that work for you? Sentence3: The travel time is 51 minutes. Can I help you with anything else? Sentence4: What time would you like to depart. I have anything from 5:00 to 23:00 Sentence5: Hello, can you help me find a train going to London Kings Cross? Sentence6: You're very welcome! I hope that you enjoy your time here! Thank you for contacting the Cambridge TownInfo centre. Sentence7: There are 3 restaurants that match what you're looking for, would you like me to book one for you? Sentence8: I would recommend the Ghandi. They are located at 72 Regent Street City Centre and can be reached at 01223353942, can I assist with anything else? Sentence9: I think that's everything I need. Thank you very much. Sentence10: Can I get the travel time for that as well? Sentence11: On Monday, from Cambridge. Sentence12: Yes, I apologize but can you give me the arrival time for train TR7786? Sentence13: Yes, please. Is there a restaurant with Indian food? Sentence14: Sure I can. The arrival time for that train is 17:51. Is there anything else I can do for you? Sentence15: I'd like to leave after 15:45, please. Sentence16: I want a cheap swedish restaurant in the centre, please. Sentence17: Sure! What day are you planning on leaving? Sentence18: I wasn't able to find a cheap swedish restaurant in the centre of time. Would you like me to try a different type of food? Question: Who has spoken the sentence 17? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: alexander bed and breakfast is a very nice place Sentence2: No thank you. I just need to find out how much it is going to cost. Sentence3: What type of accommodation is this? Sentence4: What area would you like to stay? And do you have a certain pricerange? Sentence5: I have a business meeting in Ely. I definitely need to be on time, so I need a train that will arrive by 19:45. Sentence6: TR1469 has the latest arrival time of 18:07. Would you like for me to book it? Sentence7: I am planning a trip in Cambridge. Sentence8: Booking was successful. Your reference number is WW2TM0V8 . Will that be all? Sentence9: Where will you be going to? Sentence10: The Alexander bed and breakfast is a guest house, in the center, with a four star rating, Wi-Fi, and parking. Sentence11: The cost is 3.52 pounds. Sentence12: No, price range in mind, but I would like it to be in the centre. Sentence13: I am looking for a train. The train should leave on saturday and should depart from cambridge Sentence14: book for 7 people and 2 nights starting from thursday and get the reference number Question: Who has spoken the sentence 6? (A) User (B) System
Output: Answer: (A) User