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: Thank you, good bye. Sentence2: Sure. It's in the centre on Station Road. Anything else? Sentence3: The cityroomz is a 0 star hotel in the moderate price range. It is in the centre of town. Would you like me to book it for you? Sentence4: Is the cityroomz a guesthouse? That's what I'm looking for. Sentence5: Yes, can you book that for me for 5 people and 4 nights? I need it on Sunday. Sentence6: Have a wonderful time, good bye. Sentence7: You know what, the hotel will actually work for me. Can you tell me where Cityroomz is located? Sentence8: How about two night? Sentence9: No, Cityroomz is a hotel. The City Center North B&B or the El Shaddai are 0 star guesthouses. Sentence10: Sorry, that booking wasn't available. Maybe another day or a shorter stay would work? Sentence11: Could you help me find a 0 star hotel? Sentence12: That worked. Your reference number is YZMQ4JNN . Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: That sounds great. I need to book it for 5 people at 11:45 on Friday. Can I get the reference number please? Sentence2: Did you have a certain time you would like to leave after or arrive by? Sentence3: No but I am looking for a Lebanese restaurant in the city's center. Sentence4: Thank you for using our service today! Sentence5: Ali Baba is the only lebanese restaurant in the centre of town in the moderate price range. Sentence6: Yes, I need to arrive at Bishops by 14:45. Sentence7: Thanks for that. I also need a train to bishops stortford from cambridge. I need it to leave from cambridge on Friday. Sentence8: You're all set. Ali baba will be expecting the 5 of you at 11:45 on Friday. Your Reference number is : UHPZFTUK . Sentence9: TR8585 leaves cambridge at 13:29 and arrives in Bishops Stortford at 14:07. The price is 10.10 pounds. Would you like me to book it for you? Sentence10: sure, i have so many options for you! Sentence11: Bedouis is located in the centre of town. Their address is 100 Mill Road City Centre. Their phone number is 01223367660 Sentence12: Great, what would you recommend for me? Sentence13: Thanks so much. That's all I needed today. Sentence14: I would recommend Bedouin,which serves African food and is in the expensive price range. Sentence15: I'm afraid there is no record for such trains, should we try for a different time? Sentence16: I am traveling to Cambridge and looking forward to try local restaurants. Sentence17: Can you give me addresss and phone number please Sentence18: Any arrival time would work so long as it gets to Bishops before 14:45. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System