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

[Q]: Sentence1: No thank you, goodbye. Sentence2: I'm sorry, there are no Korean restaurants in the north part of town. Can I help you find anything else? Sentence3: Thank you for using our system. Good bye Sentence4: How about any area? Sentence5: I would like a restaurant in the north part of town that serves korean food Sentence6: What is the address and price range? Sentence7: Little Seoul is at 108 Regent Street City Centre and is an expensive restaurant. Do you want the phone number? Sentence8: little seoul is in the centre and serves korean food Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Booking was successful, the total fee is 450.6 GBP payable at the station . Reference number is : G368B2VI . Can I help with anything else today? Sentence2: I would like to stay in the centre of town please. Sentence3: TR0254 Leaves at 05:40, would you like me to book that for you? Sentence4: I will be departing from Birmingham New Street on Tuesday. Sentence5: The price is 75.10 pounds and it is a 163 minutes ride. Can I help you with anything else? Sentence6: Please book 6 tickets and send me the reference number. Sentence7: No thank you. Please tell me about the ticket pricing and time of travel Sentence8: Okay, the postcode is cb11ly. What else can I help with? Sentence9: No, not yet. I just need the postcode. Sentence10: Thanks for using Cambridge TownInfo centre. Have a great day! Sentence11: I'm looking for a train that goes to Cambridge and arrives by 08:45. Sentence12: The Gonville Hotel will meet all of your needs. Would you like me to book it? Sentence13: I found two expensive hotels, one in the centre and one in the south of town. Do you have a preference? Sentence14: Again, 3 star with free wifi. I don't care about the price. It has to be in the centre, though. Sentence15: That is all, thank you for your help today. Sentence16: Yes please. I need a 3 star hotel that offers free wifi Sentence17: I found 231 trains that fit your request. Where will you be departing from? Sentence18: What price range and what star rating are you looking for ? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Thank you for all your help today. I appreciate it. Sentence2: i want to leave after 14:45 Sentence3: Glad to have been of help. Thank you for using the Cambridge TownInfo centre. Have a great day Sentence4: It is located at 35 Saint Andrews Street City Centre. It is a moderately priced international restaurant. Sentence5: Booking confirmed. Reference number is : HAJW2I1I . The table will be reserved for 15 minutes. Sentence6: I'm trying to find a train that leaves on Sunday and going to Cambridge. Can you help? Sentence7: I will be departing from Ely. Sentence8: Great! Thank you! I'm also looking for a particular restaurant. Its name is called the varsity restaurant. Sentence9: It is 18.88 pounds and last a total of 51 minutes. Sentence10: How about TR9823 departing ely at 15:35 and arriving in cambridge at 15:52? Would you like me to book a seat for you? Sentence11: The earliest train leaves at 5:35 and the latest at 23:35. They run every 2 hours. What time would you like to depart or arrive? Sentence12: I'm headed to cambridge. Sentence13: Thanks for the info! Can you please book me a table for 7 people at 18:45 on Sunday? Sentence14: TR7931 departing London Kings Cross at 15:17 and arriving in Cambridge at 116:08. Would you like me to book a seat for you? Sentence15: What is your destination? Sentence16: I'm sorry, I needed to ask you from where would you be departing? Sentence17: Could I get the price and the travel time for that train? Sentence18: Wait. Leaving for London king not Ely. I am going to Cambridge. I need a train for that. Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User