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

[Q]: Sentence1: I'm looking for a train that departs cambridge on saturday. Any ideas? Sentence2: I would like to leave after 16:30 and would like to go to kings lynn. Sentence3: Yes please and I'll also need the postcode. Sentence4: I am not showing any hotels with 1 star that have free parking, would you like to look for something else? Sentence5: We have three 4 star hotels that provide free internet and free parking. Is there an area you would prefer to stay at? Sentence6: the postcode is cb236bw. it is a hotel in the cheap price range. when would you like to stay from, how many people, and for how long? Sentence7: Alright, are there any 1 star hotels that offer free parking? Sentence8: There are 202 trains that leave Cambridge on Saturday. Sentence9: I recommend The Cambridge Belfry, a cheap 4-star hotel on the west side. Would you like to reserve a room? Sentence10: I'm interested in the earliest one. What is the train ID? Sentence11: Sorry, no, I do not see any one star hotels with free wifi. Would you like to try another option? Sentence12: That's the TR2840. Sentence13: That was all I needed. Thank you. Sentence14: Are there any with 4 stars? Sentence15: There are 7 trips that would work. The earliest leaves at 17:11 and the latest leaves at 23:11. The train ride will be 47 minutes. What would you prefer? Sentence16: The cambridge belfry is a hotel, not a guesthouse. May I help with something else? Sentence17: Does any of them have free wifi? Sentence18: You're welcome! Have a great day. Sentence19: I need the postcode, hotel type, and price range for The Cambridge Belfry. Sentence20: I need more information on the number of nights and people. Sentence21: Any place is fine, I go with whatever you recommend. Sentence22: Forget about booking it, just please tell me what type of hotel it is. Question: Who has spoken the sentence 11? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Yes please. Please make sure the restaurant has a table available for booking for seven people on sunday at 13:15. Sentence2: Glad to be of service! Goodbye! Sentence3: I would really like to get really great Chinese food. Can you suggest an expensive chinese place? Sentence4: Yes! There are 5 that I have found. One in the East, 2 South, 1 North and 1 Centre. Would you like the address of any of them? Sentence5: I have 4 swimming pools to choose from. 2 are in the north, and I have one in the east and centre. Do you have a preference? Sentence6: I don't have a area of town preference. Sentence7: Sure! Abbey Pool and Astroturf Pitch is at Pool Way, Whitehill Road, off Newmarket Road. Would you like the phone number? Sentence8: What type of food. Sentence9: Hey I am looking for a swimming pool to go to while in Cambridge. Can you find me one Sentence10: Great that's all I needed. Thanks for your help. Bye. Sentence11: naw, but i'm looking for some food Sentence12: Sure, there are a number of options. Is there a particular area of town you were interested in? Sentence13: I think the one in the East would be best. Can you give me an address for it? Sentence14: I booked you a table at Hakka (ref #7K0C5AJN). They're on the east side at Milton Road, Chesterton. Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: great! what area of town are you thinking of? Sentence2: I've got 9 guesthouses in that price range. Do you need internet and/or parking? Sentence3: 154 chesterton road Sentence4: Unfortunately, there aren't any in that area. How about another location? Sentence5: I'm not sure yet. I'm really researching right now. Can you please recommend a guesthouse in the north in the moderate price range? Sentence6: okay, I can help you with that. When are you planning your stay? Sentence7: I have found 7 hotels now that match your criteria for parking and internet. Would you like me to choose on for you? Sentence8: What day do you need the train? What is your destination? Sentence9: how about one that is in the type of museum.and make Make sure you get address Sentence10: Kettle's yard is museum in the west part of town. It is located on castle street. Sentence11: No but I do need to know if they have internet, free parking, and the address of the guesthouse of your choice, thanks! Sentence12: I'd like it to be a guest house in the north. Sentence13: Yes, please, I would appreciate that. Sentence14: I recommend Acorn Guesthouse. They are in the moderate price range and have 4 stars. They offer both free internet and parking. May I reserve you any rooms? Sentence15: Thank you, that is everything, sorry for being so annoying in the process. Sentence16: Yes, please tell me your favorite guesthouse in the north and let me know their address and whether they offer free Internet and parking. Sentence17: Ok great, and how many people and nights? Sentence18: I would like to book a train. Sentence19: I also need a moderate priced room. Sentence20: I actually don't need a room. I just need the address please. Sentence21: I am sorry I mean I want a nightclub to go in the wast side of town. Sentence22: No worries at all. Thank you for using the Cambridge TownInfo centre. Enjoy your stay. Question: Who has spoken the sentence 21? (A) User (B) System
[A]:
Answer: (B) System