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

[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: Sure, it's at granta place, Mill lane. Sentence2: Sure it's a moderately priced 4 star guesthouse in the east. Would you like me to book it? Sentence3: From all of us at Cambridge, we hope you enjoy your stay! Farewell! Sentence4: Thank you so much for all of your help today. I am all set. Bye. Sentence5: Could you tell me their address as well please? Sentence6: Thanks! I'm also looking for information on the A & B Guesthouse. What can you tell me about that place? Sentence7: Yes, the post code for the A and B Guest House is cb12dp. Is there anything else I can do for you? Sentence8: What is the phone number for scudamores punting co? Sentence9: Okay, which would you like to leave from? Sentence10: The phone number for Scudamores Punting Co is 01223359750. Is there anything else I can help you with today? Sentence11: Your taxi is booked. The car is a yellow honda and the contact number is 07826111038 Sentence12: May I have the postcode? Sentence13: I would like to leave the hotel by 7:00. Also, can you give me the contact number and car type once you have booked it? Sentence14: I also need a taxi to go between the two places. Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: I'm planning a trip to Cambridge and I was told the A and B Guest House was a great place to stay. Can you give me information about it? Sentence2: Okay, sounds good. Also I need to get a train from Liverpool street to Cambridge. Sentence3: Thanks for using our system! Sentence4: The train should leave after 12:45 and should leave on friday. for 2 people please book. Sentence5: I need two tickets. Sentence6: TR5015 leaves london liverpool street at 13:39 and arrives at cambridge by 15:07. Would this work for you? Sentence7: Yes, I would as a matter of fact. And yes the offer free parking. Sentence8: Absolutely! This is a moderately priced guest house with four stars. There is wifi included. It is located on the east. What else can I help with? Sentence9: Oh wait, you know what? I forgot to ask about star ratings. What's the star rating on the A and B Guest House, please? Sentence10: Does that train leave on Friday? Sentence11: Okay, two tickets are booked, for a total price of 33.2 GBP, and your reference number is MY04HJ0A, do you need anything else today? Sentence12: No thanks, that is everything. Sentence13: Yes, that train leaves on Friday. Sentence14: Do you have free parking? I refuse to pay for parking in a hotel that I am staying at. Wouldn't you agree? Sentence15: What day would you like to make this trip? Do you have any other specifications? Sentence16: It has four stars. Would you still like information on the train? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User