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

[EX Q]: Sentence1: Please check again for a college in any area. Sentence2: Hmm, I think we are getting confused on what I need. I really need to find a hotel with 4 stars in the east. Or a guesthouse will do also. Sentence3: I'm sorry, we do not have any college listings. Sentence4: I think allenbell would suit you well. Would you like more information? Sentence5: Gonville and Caius college is quite interesting. Their post code is cb21ta. Their address is trinity street. Sentence6: Thanks, I will need a taxi from the guesthouse to the attraction. I'd like to leave the guesthouse by 24:30. Sentence7: Could I get the postcode, phone number and whether they have free parking? Sentence8: There are 4 museums in the east. Any preferences? Sentence9: There's Christ's College on Saint Andrew's Street. It's in the centre and free. Are you interested? Sentence10: Yes. Can I get the postcode? Sentence11: The Allenbell's postcode is cb13js. Their phone number is 01223210353 and yes they do have free parking. Would you like to book this one? Sentence12: The centre is fine and free would be great! Sentence13: there are no colleges in the east, can i look somewhere else? Sentence14: A majority of our colleges are in the centre, but not all of them have free admission, are you looking for one with no entrance fee? Sentence15: Thanks. I also need an attraction to visit in the college category. Any suggestions? Sentence16: Yes I would like to go to a college regardless of the area. Sentence17: Thank you very much. Sentence18: I need a place to stay. I would like a 4 star place in the east area. Sentence19: Yes, I'd like a place that includes free wifi and it should be a hotel. Sentence20: In the west I have two 4-star hotels - the cheap Cambridge Belfry and the expensive Huntingdon Marriott. Sentence21: No, it would not. What do you have in the west area? Sentence22: Okay, what about Museums in the east? Sentence23: I'm afraid all of our 4-star accommodations in the east are guesthouses. Would one of those suit you? Sentence24: Okay great, have a good night! Sentence25: Alright, got you a grey Toyota taxi to pick you up from the Allenbell at 24:30. Contact number is 07330473463. Anything else I can do for you? Sentence26: Sure we have 6 places, do you have any other preferences? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I am sorry there is nothing that meets that criteria. Is there another type of food or area you would be interested in? Sentence2: Thanks, will you please book a table for 7 people on thursday at 13:00? Sentence3: I'm looking for a restaurant in the east. Sentence4: How about British food? Sentence5: There are nine restaurants in the east. Do you have a price range in mind? Sentence6: You are welcome. Enjoy your dinner! Sentence7: Booking was unsuccessful. can we book another day or time slot? Sentence8: Nope, that should be everything. Thank you so much for all of your help. Sentence9: Booking was successful for Thursday at 1200hrs , table for 7 at Grafton Hotel restaurant. Your Reference number is KQKTCX5Y . Is there anything else I can help you with? Sentence10: I would recommend you try Grafton Hotel Restaurant. As requested it is in the east and serves British food. Sentence11: I don't have a price range but I am looking for asian oriental cuisine. Is that possible? Sentence12: please try booking at 1200hrs and get me the reference number Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: A museum would be great. Could I have the address of one you suggest? Sentence2: That sounds great. May I have the address, please? Sentence3: Thank you! That's all that I needed. Sentence4: I found a few choices for you. Would you be interested in Chinese, Indian, Italian, or Mexican cuisine? Sentence5: Your reservation is booked at Chiquito Restaurant for 19:30 on Monday. The restaurant is located at 2G Cambridge Leisure Park, Cherry Hinton Road in Cherry Hinton. Your reservation number is SLYNF4LH . Sentence6: You're welcome, have a great day. Sentence7: Yes, will there be any theater performances on the next night, Tuesday? Sentence8: the byard art museum offers free entrance fee Sentence9: The Byard Art Museum is located at 14 King's Parade. Is there anything else I can help you with? Sentence10: Wonderful. Have a good visit. Sentence11: I want an expensive restaurant in the South. Sentence12: Mexican will would great. I need a reservation for 2 at 19:30 on Monday. Sentence13: Actually that is all I need. thank you for you're help. Sentence14: Your taxi reservation has been confirmed on a white skoda. Their contact number is 07558835298. Is there anything else I can help you with? Sentence15: Actually, I am also looking for places to go in the same area as Chiquito Restaurant is. Sentence16: Yes can you book me a taxi to take me to the restaurant from the museum? Sentence17: We have several. Would you be interested in a museum, a park or a theatre? Sentence18: If you want to stay in the south, there is the Junction on Clifton Way. There are also 4 theatres in the center of town. Do you want more information? Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]:
Answer: (B) System