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

Example Input: Sentence1: Actually, I'm all set. Thank you! Bye! Sentence2: OK, great. will it be the same two people as on the train and starting on Monday? or do you have different needs for lodging? Sentence3: What is the price for that trip? Sentence4: Could you clarify if you need the reservation for 1 or 2 people please? Sentence5: Certainly, where will you be departing from? Sentence6: It look like the TR0532 is what you are looking for departing Bishops Stortford at 7:29 and arriving in Cambridge at 8:07. Would you like to book? Sentence7: The postcode for Worth House is cb41da and yes, it has internet! Sentence8: I would prefer the hotel be in the north part of town. Sentence9: I don't need to book today, thanks. Can you get me the postcode of one of them? Oh, and please make sure the one you choose has internet! Sentence10: Okay you sure you will not require a booking? Sentence11: I need a cheap hotel with free parking. Sentence12: The fare is 10.10 GBP per ticket. Sentence13: Okay let me see if I can book that for you. Sentence14: I need reservations for 2. Sentence15: Hi I am looking for a train to arrive in Cambridge by 08:15. Sentence16: Nope, same people. Sentence17: I've booked your tickets for the 7:29 train from Bishops Stortford, reference ZHT6R80S . Can you give me more information about the type of hotel you'd like? Sentence18: 1 person 5 nights please Sentence19: There are 10 total hotels, do you have a preference for area? Sentence20: I'd be happy to book that for you, what day will you be arriving on, and for how many nights? Sentence21: I'll be leaving from Bishops Stortford on Monday. Sentence22: I will go ahead an book at the Worth House. Sentence23: City centre north b and b and Worth house are both guesthouses and located in the north. Would you like me to book one for you? Sentence24: I need to make a booking for 2 people and can you find me a place to stay in the north? Question: Who has spoken the sentence 17? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes please book it for one person for 2 nights starting friday. Sentence2: Sure. Your booking was successful and I have a reference number for you. It is IBDDDIAJ . Sentence3: Thank you for using our service today. Sentence4: I'm looking to get some info on a hotel called cityroomz. Sentence5: Thank you very much for your help. Have a great day. Sentence6: I've found it, would you like me to book it for you? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes there are many types of food and price ranges in Cambridge. Do you have a preference for either? Sentence2: TR5343 leaves Cambridge at 15:21 and gets to Stevenage at 16:10. That's the last train of the day. Would you like to book a reservation? Sentence3: Going to the sweet land of Stevenage, on tuesday. I need to get there by 17:00 Sentence4: Yes...for 3 people on Tuesday at 11:15. Sentence5: No can I just get the price please? Sentence6: Okay, what day and time would you like to travel and where is the destination? Sentence7: I have made the reservation and your reference number is 7PD27O8B . Sentence8: Hello, I am planning a trip to Cambridge. Can you help me with a restaurant? Sentence9: They serve french food and are in the north and quite expensive. Would you like to book a table? Sentence10: Thank you for contacting us. Have a nice day. Sentence11: I am also in need of a train leaving Cambridge. Sentence12: Sure. The price for that train would be 12.80 pounds. What else can I help you with today? Sentence13: That will be all for toady. Thanks ! Sentence14: No, just looking for a restaurant called Restaurant two two Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System