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

[Q]: Sentence1: You're welcome and thanks for using our help desk. Goodbye. Sentence2: Thanks for the recommendation. That's all the help I need today. Sentence3: I'm looking for the entrance fee for Castle Galleries. Sentence4: Yes, i would like help locating an attraction. Sentence5: OK - what type of attraction are you looking for, and in what part of town? Sentence6: Their entrance fee is free. Question: Who has spoken the sentence 1? (A) User (B) System
[A]: Answer: (B) System


[Q]: 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
[A]: Answer: (B) System


[Q]: Sentence1: I have many choices: theater, colleges, museums, architecture. Do any of these venues interest you? Sentence2: Christ's College offers free admission. Sentence3: What day would you be arriving on and for how many people? Sentence4: There are 7 hotels that meet that criteria. Do you have an area preference? Sentence5: Fantastic. I have all of the information I needed, thank you. Have a great day. Sentence6: Any of them will do. I'll book a room in whichever one you think is best. Sentence7: Do any of these 7 have free wifi? Sentence8: That would be fine. Can you confirm the entrance fee? Sentence9: That would be great. Two nights please. Sentence10: Yes certainly. We have several. Christ College is a good choice. Sentence11: I have 18 results that match your request. To help narrow it down, what part of town would you like to stay in? Do you have a price range preference? Sentence12: The hotel also needs to be cheap and have free wifi. Sentence13: The alexander bed and breakfast is in the center of town, would you like help with the booking? Sentence14: Let's try 5 nights, starting Friday, with 2 people. Sentence15: Yes, I am looking for something to do during my stay. I'd like it to be around the centre area. Sentence16: I have confirmed your reservation at alexander bed and breakfast starting Friday for 5 nights. Your reference number is K67RS8EB . Is there anything else I can help with? Sentence17: Glad to have been able to assist you. Thank you and have a great day. Sentence18: I am looking for a 4 star guesthouse in Cambridge. Sentence19: They all have free wifi. Sentence20: Are there any colleges in the centre of town that have free admission? Question: Who has spoken the sentence 6? (A) User (B) System
[A]:
Answer: (A) User