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

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
Answer: (B) System

Sentence1: The address for Little Seoul is 108 Regent Street, City Centre. Is there anything else I can help you with? Sentence2: Yes, I would like both the phone number and the postcode please. Sentence3: I'm looking for an expensive restaurant in the centre if you could help me. Sentence4: I got that backwards. Need a train leaving Kings Lynn after 9:15 and arriving in Cambridge sometime on Saturday. Sentence5: There is a Korean restaurant called Little Seoul located at 108 Regent Street City Centre. Would you like their phone number? Sentence6: TR2514 leaves at 10:11 and arrives at 10:58. Will this one work for you? Sentence7: Sure. Could you tell me the exact travel time? Sentence8: Sure. The travel time for TR2514 is 47 minutes. Anything else I can help you with today? Sentence9: I sure can. There are lots of choices. Are you looking for a particular type of food? Sentence10: Have a wonderful day yourself. Goodbye. Sentence11: Can I also have the address please? Sentence12: that is it for today. good day thank you Sentence13: I also want to see the travel times for a train going from Kings Lynn from Cambridge on Saturday. It should leave after 09:15. Sentence14: Is there a time you would like to arrive by? Sentence15: The phone number for little seoul is 01223308681, postcode cb21dp. Can I help you with anything else today? Sentence16: No, not really. I think I'd like to try something different. Could you suggest something? Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System

Sentence1: No thank you. That is all. Sentence2: TR4283 leaves Cambridge at 05:29 and arrives in bishops stortford by 06:07. Is this okay? Sentence3: Can I get the price of the ticket please? Sentence4: I am looking for a train to leave on Monday. Sentence5: I just need the train ID, departure time, and price of one please Sentence6: OK, have a great day. Bye. Sentence7: We have 7 such entries. Do you have a preference further? Sentence8: Certainly. It's 10.10 pounds. May I help with anything else? Sentence9: I need to arrive at bishops stortford by 20:00. Sentence10: Sure. Where are you looking to go? Question: Who has spoken the sentence 4? (A) User (B) System

Answer: (A) User