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

Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: You are very welcome. Goodbye. Sentence2: I am looking for an expensive restaurant in the east part of town. Sentence3: Is there anything else? Sentence4: What is the phone number for Yu Garden? Sentence5: yu garden is on the east side, would you like the phone number? Sentence6: The phone number for Yu Garden is 01223 248882. May I help you with anything else? Sentence7: No, I think that's it. Thank you for your help. Sentence8: I have found several. Would you like British, Indian, gastropub, or Chinese? Sentence9: There are no other types of expensive restaurants in the east, would you like to try another area? Sentence10: Is there another chinese restaurant in the east? Sentence11: Yu Garden is the only Chinese restaurant on the east side of town in the expensive price range. Sentence12: No, that's okay. What Chinese restaurants are there on the east side? Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: I would be happy to help you find a great attraction to visit! What kind of attraction are you interested in visiting? Sentence2: You're welcome. Sentence3: Great, thanks! I think that's all I needed. Sentence4: I would like to find a nice attraction to visit in the centre of town. Sentence5: I'll be heading to Cambridge, but I can't leave until sometime after 21:15, please. Sentence6: I have no preference. Can you make a recommendation and provide the address, entrance fee, and postcode? Sentence7: The address is 98 King Street and the postcode is cb11ln. What is your destination on Friday? Sentence8: How about the Broughton House Gallery? There is no entrance fee. Sentence9: I managed to book you on that train. The total fee is 9.8 GBP and the reference number is 9M753T1T . Sentence10: There are two trains meeting your needs. The earlier train leaves at 22:11 and the later train at 23:11. The ride takes 47 minutes. Which do you want me to book? Sentence11: Can you get me one ticket on the 22:11 train? Sentence12: whats its postcode and address? i would also like to get a train that leaves friday from kings lynn Question: Who has spoken the sentence 1? (A) User (B) System

Answer: (B) System