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

Example Input: Sentence1: That would be TR5906 at 21:39 on Monday. Sentence2: The first train after 21:15 works for me. I need to book it for three people, please provide the reference number. Sentence3: Thank you so much for all your help. Sentence4: Great, have a wonderful day! Sentence5: Will you be needing anything else today? Sentence6: I am interested in cinemas specifically. Sentence7: There are 70 trains that leave from London Liverpool Street to Cambridge, what day and time would you like to leave? Sentence8: Excellent. I'd also like a train please. One that leaves from london liverpool street to cambridge. Sentence9: I can certainly book that for you! However, could you let me know what day of the week you'll be travelling? Sentence10: I'm looking for places go to in the south of town. Sentence11: No thank you. That is everything I need at this time. Sentence12: I have booked 3 tickets for you for 49.8gbp payable at the station. your reference number is ETOI91ON Sentence13: The Cineworld Cinema is in the South part of town. Their phone number is 00872208000. Would you like their address? Sentence14: I will be traveling on Monday, and I will need the reference number as well. Sentence15: Great! Thank you. What a relief. Sentence16: Yes, please give me the address and postcode. Sentence17: It's located at cambridge leisure park, clifton way and the postcode is cb17dy Sentence18: The attraction types in the south area are theatre, park, nightclub, museum, cinema, and entertainment. Which one are you interested in? Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: There are 44 possible options. What type of attraction are you interested in? Sentence2: No, that's all I need today. Thank you for your help. Sentence3: I can book a 05:54 for you. Sentence4: You're very welcome, is there anything else I can do for you? Sentence5: I need the train to leave after 15:45 please. Also do you have the entrance fee for the Vue Cinema? Sentence6: Sorry, but I do not have the entrance fee for Vue Cinema in my database. I do have a train from stevanage at 15:54 for you, though. Sentence7: Hello, I'm looking for places to go in the city centre. Sentence8: Have a great day then! Sentence9: How about the Vue Cinema located at the grafton centre, east road? Sentence10: Thank you for your help. Sentence11: Great can you make that reservation on the train for 7 people and send me the reference number? Can you also send me the phone number for the Cinema? Sentence12: I don't mind what kind. Sentence13: Sure, what is the entrance fee? Also I need a train that departs from Stevenage on Thursday. Sentence14: The train is booked reference number 3YY4QV9P, and the phone number of the Vue Cinema is 08712240240 Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Not at this time. Thank you. Sentence2: What time would you like to arrive by? Sentence3: I'm also looking for a particular hotel. Its name is called cityroomz. Sentence4: It does not matter. Sentence5: I would be happy to help with your request, what day will you be leaving? Sentence6: I really need to get out of Cambridge! Can you find me a train to Leicester? Sometime after 08:45 because I like to sleep in. Sentence7: Have a fantastic day, goodbye. Sentence8: I also need the travel time and arrival time please. Sentence9: The ticket price is 30.24 pounds. Can I be of further assistance? Sentence10: I have booked a room for 8 for 4 nights beginning on Tuesday. Your reference number is SY5AJ8CL . Is there anything else I can help you with today? Sentence11: No thank you. What's the cost of the ticket? Sentence12: Sure, what kind of information do you need? Sentence13: I'll be leaving this place on Saturday. Sentence14: arrival time is 11:06 and travel time is 105 minutes Sentence15: There is a train that leaves at 9:21 and arrive in Leiester at 11:06. Would you like me to book it for you? Sentence16: I'd like to to book it for 8 people and 4 nights starting from tuesday Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User