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

[EX Q]: Sentence1: Well, there are 12 guesthouses and 2 hotels in town that fit your criteria, they all offer free WiFi. Do you have a price range in mind or a star rating? Sentence2: Most definitely. Would you like to go ahead and book a reservation? Sentence3: Do you have a preference of type of lodging, star rating, or internet? Sentence4: I'd recommend a nightclub if you don't mind paying or a museum if you're looking to do something free. Sentence5: We have 44 places to visit in the centre, any specific preferences in mind? Sentence6: I'm sorry, the Acorn Guest House is a guesthouse. Is that acceptable or did you want a hotel specifically? I apologize for the confusion. Sentence7: It's located at 154 chesterton road, the postcode is cb41da, and you can reach them by phone at 01223353888. Sentence8: I'm looking for places to go in the centre area of town. Sentence9: Yes, I would. Can I get the address, area, and phone number? Sentence10: I don't care about any particular area to be honest. Sentence11: How about the acorn guest house? Sentence12: My favorite is the Cambridge Contemporary Art Museum and their phone number is 01223324222 and the post code is cb21su. Admission is free. When would you like a hotel? Sentence13: I would just like to know what is available. Oh I also need free wifi. Sentence14: As long as it has everything I've been asking for, I'm good. Sentence15: Thank you. That was all I needed. Goodbye. Sentence16: I'll repeat this: The hotel should be in the moderate price range and it should include free wifi and free parking. I don't care about the area. Sentence17: A museum sounds good. Do you have the poscode and phone number? I also need a place to stay that is moderately priced with free parking. Sentence18: I found 14 for you. Do you have a specific area you'd like? Sentence19: What would you recommend? Sentence20: I would like a hotel in the moderate price range and it should include free parking. Question: Who has spoken the sentence 16? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: i'm sorry, i was unable to find a different hotel that matches your criteria and the availability that you wanted. Sentence2: Good day, thank you for using us, if you need anything else let is know. Sentence3: Yes, I'm looking for an expensive hotel to stay at, can you help me? Sentence4: Is there a specific side of town you'd like to be on? Sentence5: Yes. I would like to stay at University Arms for 2 people, for 2 nights, starting from Friday. Sentence6: Booking was unsuccessful. Would you like to find another hotel? Sentence7: That's too bad. Would you be able to find me a different hotel in the same price range? Sentence8: Are both hotels or are they guest houses? Sentence9: Hold on, I forgot about the Gonville Hotel I mentioned earlier. I got you a room. Your reference number is : B01G0B4W. Can I do anything else? Sentence10: Thats disappointing,thank you andgoodbye. Sentence11: Yes, I would like to stay in the city centre. Also, I would need free parking. Sentence12: That is all. Thank you. Sentence13: You have the Gonville Hotel or the University Arms to choose from. The Gonville is a 3 star hotel while the University Arms is 4 star. Sentence14: They are both hotels. Would you like for me to book one of these hotels for you? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I have 3 listings for fitzbillies restaurant,the cambridge chop house and midsummer house restaurant. Sentence2: There are 7 British restaurants in the centre to choose from. Would you prefer a moderate or an expensive price range? Sentence3: There are 7 trains that can get you there, the earliest is levaing at 05:19, the latest at 08:19. Do you have a time you'd like to leave the station? Sentence4: Your booking was successful. The table will be reserved for 15 minutes. The reference number is : YONTCHWD . Is there anything else I can help you with today? Sentence5: Hm, how about we try the centre area for the polish food. Sentence6: If i remember right, I had you as a party of 8, I booked 8 tickets for TR9303. Cost is a total of 132, total reference # 011FPABG . Sentence7: Yes, I'll need tickets for my entire party. Sentence8: i will try british food Sentence9: Yes, that was correct. Thanks for all your help. My ride is here. I've got to go. Bye. Sentence10: i'd like an expensive, please. Sentence11: No, I do not care what time it leaves as long as it arrives in Cambridge by 9:30. Sentence12: Can I get a table for 8 at Fitzbillies? Thursday at 12:15, please. Sentence13: There are no Polish restaurants in the city. Would you like to try something else? Sentence14: I also need a train from peterborough on thursday. I'd like to arrive in cambridge by 09:30. Sentence15: I'm sorry, I don't have any Polish restaurants in the area. Is there anything else you'd be interested in? Sentence16: Have a nice day. Sentence17: Are there any good polish restaurants in the city? Sentence18: Let's get you on the TR9303, it leaves Peterborough at 8:19 and gets to Cambridge at 9:09. Would you like a reservation? Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]:
Answer: (B) System