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

[Q]: Sentence1: There are 2, both free. They are sheep's green and lammas land park fen causeway, and other is wandlebury country park. Would you like information on either one? Sentence2: There are only 4 boat attractions in town. Camboats in the east. Riverboat georgina is in the north. Scudamores punting company and the cambridge punter are in the centre of town. Sentence3: I'm looking for boats to look at. Can you look in the south? Sentence4: Thanks, could you also book me a taxi between the two locations please? Sentence5: I can arrange a car for you if you'll tell me whether you'll be travelling from the park to the restaurant or vice-versa, and tell me the date and time. Sentence6: Yes, I need to get their phone number and address, please. Sentence7: Could I get the entrance fee for wandlebury country park please? Sentence8: Booking was successful. Expect a grey Lexus. Their number is 07386542982. Anything else? Sentence9: I need to leave the park by 16:15. Sentence10: There are nine places in the south any preference on restaurant type or price range? Sentence11: Are there any boats in the park? Sentence12: The Pizza Hut Cherry Hinton is located in the South and has a moderate price range. Would you like more information? Sentence13: My pleasure. Enjoy your stay. Sentence14: Could you help me find a restaurant in that area? Sentence15: The park is free. There is no entrance fee. Sentence16: Their phone number is 01223323737, and they are located at G4 Cambridge Leisure Park Clifton Way Cherry Hinton. Sentence17: Thank you. Are there any parks in the south? Sentence18: Thank you for all your help. That should be everything today. Sentence19: I'm afraid we don't have any boats in the south. Would you like to try another area? Sentence20: I'd like a moderately priced Italian place. Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: book a table for 6 people at 12:00 on wednesday Sentence2: Are you looking for one in a particular area? Sentence3: I'm looking for parks in Cambridge can you help me? Sentence4: No, area doesn't matter. What park would you recommend? Sentence5: Thank you that is all I need for now. Sentence6: Okay great! I hope you have a wonderful day! Sentence7: Tandoori Palace in the west is a wonderful Indian restaurant. Would you like their phone number or a reservation there, perhaps? Sentence8: I was able to book a table for 6 they will hold the table for you for 15 minutes. The reference number is M4ILDKD4 . Sentence9: The postcode is cb18dw. Sentence10: There are fifteen Italian restaurants in town. Do you want a specific part of town, or maybe a certain price range to narrow down the search? Sentence11: I need help finding a book on italian food Sentence12: No just the postcode please. Sentence13: Thanks. Could you help me find and expensive Indian restaurant perhaps? Sentence14: Cherry Hinton Water Play park in the east is an excellent place to keep cool on hot summer days. Would you like the address? Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: Is it in the moderate price range? If so, yes. Sentence2: I'd be happy to help you find something. Is there an area you prefer? And do you want a hotel or guesthouse? Sentence3: And for how many days? Sentence4: Are there any cheap guesthouses in the centre of town? Sentence5: I would recommend el shaddai. Would you like a reservation? Sentence6: Yes, that will work! I need the reference number please. Sentence7: There are 7 trains that fit your criteria. The first one after 10 is the TR8377, leaving Cambridge 11:21, arriving Stevenage 12:10. Would you like to book a seat? Sentence8: I'm sorry there are no moderate guesthouses in the centre, maybe another area perhaps? Sentence9: There will be 2 people and we will arrive on Monday. Sentence10: I'm sorry, 5 nights please. Sentence11: Thank you so much! That's all I needed. Have a great day! Sentence12: Please give me your departure site and your destination station. Sentence13: I definitely want both a guesthouse and the centre of town. Sentence14: Yes, I've located Alexander Bed and Breakfast that is a 4 star and El Shaddai that is a 0 star. Do you have a preference? Sentence15: Good News! I got the Alexander Bed and Breakfast in 56 saint barnabas road cb12de, phone number 01223525725. The reference # is 3MWI64S9 . Sentence16: Great. I also need a train leaving on Saturday. Sentence17: I would like to try another price range, only in the moderate range. I would like to stay in the city centre. Sentence18: no preference I also need a reference number. Sentence19: I am going to cambridge and need a place to stay. Sentence20: Booking was successful, the total fee is 10.24 GBP payable at the station . Reference number is : Y5AV9STN . Sentence21: Have a nice day then, and goodbye. Sentence22: It is not in the moderate price range, would you like to try another area or a different price range perhaps? Sentence23: What day would you like to stay and how many people will be staying? Sentence24: The train should leave after 10:00 and should go to stevenage, leaving from cambridge. Question: Who has spoken the sentence 17? (A) User (B) System
[A]:
Answer: (B) System