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

Example 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
Example Output: Answer: (A) User

Example Input: Sentence1: Booking completed! Booked car type : red ford Contact number : 07059574947 Sentence2: Thats everything I needed thanks for the help! Sentence3: I'm afraid there aren't any theatres on the west side. most of our theatres are in the city centre. is there something else I can look up for you? Sentence4: Yes, I love museums. Sentence5: Yes I also need a taxi to arrive there by 18:00 from the theater. Sentence6: I'll be here any time. Sentence7: Can you find a restaurant called Rajmahal. Sentence8: There are several museums in the area. Would that interest you? Sentence9: Great, thanks. I'm also interested in attending a theatre on the west side. Sentence10: Ok are there any attractions in the west you recommend? I need a phone number for whatever you chose. Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 1XCDMW6O . Sentence12: In the west if there are any there? Sentence13: Sure. It's an Indian place in the east area of town. What would you like to know about it? Sentence14: What entertainment choices are in the west? Sentence15: sorry, i couldn't find anything in the west. Sentence16: That's all I need to know. Can you reserve me a table for 3 Saturday at 18:00? Sentence17: How about the Kettle's Yard, there phone # is 01223748100 and they are on Castle Street. Admission is free too. Does this work? Sentence18: What side of town would you like to be on? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Your tickets are ready . Reference number is : NGHD22EZ . Sentence2: I also need a guesthouse with free wifi. Can you help me find one? Sentence3: On sunday. I'd like to arrive by 09:45. Sentence4: I'm looking for a train going to kings lynn. Sentence5: I have 4 trains on Sunday from Cambridge to Kings Lynn. The TR8042 arrives at 08:58. Would you like me to book it? Sentence6: What area are you looking to stay in? Sentence7: Yes. Make booking for 3 people and can I have a refernce number? Sentence8: On which day will you be traveling? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output:
Answer: (A) User