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

Ex Input:
Sentence1: I am interested in finding a great nightclub to take a friend to. Sentence2: I've booked a table for 5 on Monday at 17:30. The reference number is MUBJSMLX . Is there anything else I can help you with? Sentence3: I have found 4 restaurants. Do you have a preference of area? If not that Kohinoor in the centre is very popular. Sentence4: Great that was all that I needed today, thank you. Sentence5: Cambridge has lots of great options. Club Salsa is quite popular and is in the centre. Sentence6: I have arranged for a black Honda to have you arrive at Kohinoor by 17:30. The contact number for the Taxi is 07997403672. Is there something else I can assist with? Sentence7: That sounds great. How much is the entrance fee? Sentence8: Perfect, can you also help me find a place to eat that is cheap and serves Indian food? We are looking to accommodate 5 people at 17:30 on Monday. Sentence9: Just book it on Monday please, for 5 at 17:30. Sentence10: Perhaps their phone number? Sentence11: The phone number is 07782218745. Sentence12: The Club Salsa entry fee is 5 pounds. Can I help with anything else? Sentence13: You're welcome! Have a good day. Sentence14: We need a taxi from Club Salsa that will get us to Kohinoor in time to eat. Can you make that happen? Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Not really. Would you see if the highest rated, least expensive guesthouse has rooms for 5 nights for 6 people, beginning Wednesday? Sentence2: I would like to stay in a guesthouse that is in the south. Sentence3: I was able to book Rosa's Bed and Breakfast for you for 5 nights for 6 people starting on Wednesday. The reference number is RTITW2L5 . Sentence4: I am traveling to London Liverpool Street from Cambridge. Sentence5: There are 10 trains that meet your criteria. Do you have a preferred time that you would like to arrive by? Sentence6: Of course! The best option is the TR7092 leaving at 17:59 with a duration of 88 minutes. The price is 16.60 pounds. How else may I assist you? Sentence7: Yes, I was wondering if you could assist me in finding a train for Monday. Sentence8: There are 2828 trains available Monday. Where are you traveling to? Sentence9: I have found 29 hotels that fit your criteria for parking. What price range are you looking for? Sentence10: There are three guesthouses in the south with free parking in the moderate and cheap price ranges. Do you have a star or price range preference? Sentence11: I'd like to find somewhere to stay with free parking; I'm planning to rent a car during my stay. Sentence12: It was my pleasure to help. You have a great day. Goodbye. Sentence13: Thank you. I believe that is everything I need today. Sentence14: Yes, I need to leave after 17:30, please. I don't need tickets right now, I'll just need the price, travel time, and train ID. Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: It is free to enter and type is architecture. May I help you with anything else? Sentence2: No, you have been very helpful today, thank you. I am all set. Goodbye. Sentence3: Their phone number is 01223332320. Do you need anything else? Sentence4: I need a train going to cambridge. Sentence5: Yes, what is their entrance fee and attraction type? Thanks! Sentence6: On Thursday any time after 21:00. Sentence7: Where will you be departing from? Sentence8: I will departing from birmingham new street. Sentence9: I would recommend TR7324 which leaves Birmingham New Street at 21:40 and arrives at Cambridge at 24:23. Sentence10: Thank you for using our service! Sentence11: Your booking for one ticket is complete. Your reference number is VEG5Q87Q and 75.09GBP will be due at the station. Sentence12: Absolutely! What day and time would you like to leave? Sentence13: Yes. What is the phone number? Sentence14: Yes can you book that for 1 person? Sentence15: Yes, Old Schools is located in the centre area, and has no entrance fee. Anything else I can assist you with? Sentence16: I am also looking for a attraction called old schools. Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:
Answer: (B) System