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

[EX Q]: Sentence1: Is there any place to eat that serves Indian? Sentence2: Thank you so much. I think that will be it for today. You've been a great help. Goodbye. Sentence3: Yes, please book a table for 8 on Tuesday at 20:15. I'd also like the reference number, please? Sentence4: Yes could you please book that for me for 8 people and provide a reference number for the booking. Sentence5: Which area are you referring to? Sentence6: Which restaurant should I book? There are 5, in the west, that serve Indian food. Sentence7: Can you suggest one that has an expensive price range, please? Sentence8: I am looking to arrive by 17:15 on tuesday. Sentence9: Would you like me to reserve a table? Sentence10: I have the reservation booked at the restaurant. The reference number is 2YCEETCJ . Sentence11: We have many fine restaurants in the west, but I recommend Sala Thong, which serves Thai food. Would you like to book a table? Sentence12: I'm glad I could help. Have a wonderful trip and a wonderful day. Goodbye. Sentence13: Yes please book it for 8 people on tuesday at 20:15 Sentence14: Booking was successful, the total fee is 102.4 GBP payable at the station . Reference number is : AIM1QZ4C . Sentence15: I am looking for a train from Stevenage to Cambridge. Can you help me? Sentence16: I have found you a train that leaves at 15:54 and arrives by 16:43. Would you like this one? Sentence17: I would like it to be in the West of town. Sentence18: Yes, I recommend Tandoori Palace. It meets your specifications. Would you like to book a table? Sentence19: Thank you! I also am looking for a place to eat at in the west area. I would prefer a nice expensive one. Sentence20: Of course! What day would you like to leave and what time would you like to arrive? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Pick any of them, please. Book it for 6 people and 3 nights, starting thursday. Sentence2: I need something with free parking and a 4 star rating. Sentence3: I have 24 guesthouses. Let's narrow it down a bit. Do you have a price range? Sentence4: I am showing 18 colleges. Is there a certain area of town you would like? Sentence5: What is the postcode of Corpus Christi? Sentence6: Booking was successful. Reference number is : 2WPLODLS . is there anything else i can help you with? Sentence7: Not really. Which do you think would be the most interesting to visit? Sentence8: That cuts it down to 16. I can recommend the Acorn guest house, or do you have a pricerange or area of town you want to stay in? Sentence9: I would suggest Christ's college in the city centre or Corpus Christi college in the west. Christ's college is free and Corpus Christi costs 2 pounds? Which do you want? Sentence10: Hello, any interesting colleges in town? Sentence11: Their postcode is cb21rh. Can I assist you with anything else? Sentence12: I am looking for a guesthouse to stay in. Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: How many people will be staying? Sentence2: Your booking for the Aylesbray Lodge Guest House has been confirmed. Your reference number is 8GO1Q7PM . Can I help with anything else? Sentence3: It will be 4 people and 3 nights starting from Friday. Sentence4: Yeah could you please book one of those for me? Sentence5: Thank you! Have a great day! Sentence6: There are five entertainment attractions in town, two in the east, two in the south, and one in the west. Is there a particular area of town that you prefer? Sentence7: Can you try looking in the south then? Sentence8: I also need a hotel in the Centre in the moderate price range with free parking. Sentence9: I'm looking for some entertainment for later. Sentence10: You too, enjoy your stay in Cambridge. Sentence11: I don't have any that match your criteria, I'm sorry. Sentence12: I would recommend the nusha. I do not know what the entrance fee is. You may call 01223902158 to check. Do you need anything else? Sentence13: That is all, thank you. Sentence14: Yes. Please tell me the one you like best and then how much that place costs to get in. Sentence15: Yes, I'd like to stay in the south part of town please. Sentence16: I need a hotel for people for 3 nights starting Friday. Sentence17: There are two results, they are both gueshouses.There's aylesbray lodge guest house, 4 stars, and bridge guest house, 3 stars. Can I book one for you? Sentence18: There are two options: Nushua and Tenpin. Both are located at Cambridge Leisure Park on Clifton Way. Would you like the phone number for either of them? Sentence19: When would you like to book the room and for how many nights and people? Sentence20: welcome and thanks for using our services Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User