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

[EX Q]: Sentence1: No that will be all! Thank you very much! Sentence2: Done! Your table will be reserved for 15 minutes. Your reference number is 5XFZM2KU . Is there anything else that I can help you with? Sentence3: Sure, they are all expensive though. I love Tandoori Palace located at 68 Histon Road Chesterton. Sentence4: Is there anything else you need? Sentence5: They do not have an entrance fee listed, but you can always call and find out. Sentence6: Thank you for using our services. Have a great day! Sentence7: Okay, thank you for your help! Sentence8: Nevermind - I don't need the taxis after all. Can you help me find a place called tenpin, instead? Sentence9: Can you book a reservation for 8 at 14:45 on Friday? Sentence10: Can you provide me with the telephone number and book two taxi cabs to the restaurant Sentence11: Can you tell me what their entrance fee is? Sentence12: is there anything else i can help you with? Sentence13: Tandoori Palace's phone number is 01223506055. Please give me the taxi departure day and time and I'll be more than happy to book one for you Sentence14: Can you help me find a indian restaurant in the west? Sentence15: Tenpin is an entertainment venue in the south. They are located at Cambridge Leisure Park, Clifton Way. Their postcode is cb17dy. Their phone number is 08715501010. Sentence16: That sounds perfect! Thank you. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes. Book for 2 people for 4 nights on thursday and I'll need the reference number too please Sentence2: Okay, great! Enjoy your day. Sentence3: I have your table for 2 booked at the Bedouin. Would you like anything else? Sentence4: Your booking was successful. Your reference number is Q5BKFIC3 Sentence5: The reference number is 0LG9G1BT . Is there anything else I can help you with? Sentence6: We have one restaurant, the Bedouin. Would you like me to make you a reservation? Sentence7: I need the reference number too please. Sentence8: 2 people for Thursday at 19:00 please Sentence9: I was unable to find anything matching that. Would you like to try again? Sentence10: How about African food in general? Sentence11: yes please. Sentence12: The Limehouse is a moderately priced guesthouse on the north side of Cambridge. They are a 4-star establishment and offer free parking and Internet. Would you like to make a reservation? Sentence13: Thank you. Can you find us some good eats, too? We'd like something moderately priced that serves South African cuisine. Sentence14: I would be happy to book a reservation for 2. What day are you looking at and time? Sentence15: I am looking for a hotel in the Cambridge area called the limehouse. Sentence16: Thank you that is all I need. Question: Who has spoken the sentence 14? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Can i get the phone number and address for University Arms please? Sentence2: no worries, i can give you three options to choose from Sentence3: Alexander Bed and Breakfast guesthouse (cheap) and University Arms Hotel(expensive) are both available in that area and are 4 stars with parking. Sentence4: How about lebanese food? Sentence5: Yes that sounds great. Please book me a table for 5 at 20:00 on Monday. Sentence6: I'm sorry, you must have misunderstood. Would you like me to book Alexander or University Arms for your stay? Sentence7: I'm sorry, there aren't any restaurants like that. Would you like to try searching for something else? Sentence8: Yes, the centre of town please. Also, no internet is needed, but i would prefer free parking. Sentence9: Thanks, I also need to find a restaurant with modern eclectic food in Centre. Sentence10: We've got 33 four star hotels in the area. Is there any particular part of town you'd like to limit it to? Sentence11: You're welcome. Enjoy your day. Sentence12: It is in the expensive price range, and the address is regent street postcode cb21ad. You can call them at 0122335124. Could I help you with anything else? Sentence13: I need a place to stay that has 4 stars. Sentence14: No I just need the price range, address and phone please. Sentence15: Sure, the phone number is 01223351241 and the address is regent street. Would you like to book a room? Sentence16: Thank you, that is all I need. Have a good day. Sentence17: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 66Y5KK37 . Sentence18: Ali Baba is a Lebanese restaurant in the centre. It's moderately priced. Will that work for you? Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]:
Answer: (A) User