TASK DEFINITION: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
PROBLEM: Sentence1: No thank you. I have everything I need. Sentence2: The earliest train leaving after 11:45 is at 12:09 on friday. Would you like me to book this for you? Sentence3: I need 1 ticket for departure on Thursday. Sentence4: i need a train going to leicester that leaves after 11:45 Sentence5: That is fine. Can I have the train ID once it's booked? Sentence6: Of course, what day will you be traveling, and how many people will be in your party? Sentence7: I was successfully able to book you a reservation for 7. The reference number is R2RPLBI3 . Can I help you with anything else? Sentence8: There is one restaurant called bedouin, but unfortunately it does not have any open reservations for matching your specifications. Could you provide another day or time? Sentence9: Yes I want to reserve a table for 7 people at 15:00 on Thursday at an expensive African restaurant. Can you help me with this? Sentence10: Could you get a reservation at a difference expensive African restaurant? Sentence11: There are no tables available at Bedouin at that time. Would you like to try a different time slot or perhaps a different day? Sentence12: I will be departing leicester going to cambridge, sorry for the confusion. I need to leave after 11:45 also. Sentence13: Sure. If there are no other African eateries to choose from, try the 14:00 at the Bedouin. Sentence14: Sure, are you going to leicester, or to cambridge? What is your departure site please? Sentence15: Great. I have booked you one seat on the 12:09 train from Leicester and your reference number is 7UR3BFW6 . Is there anything else I can do for you? Sentence16: You are welcome. Good bye. Question: Who has spoken the sentence 15? (A) User (B) System

SOLUTION: Answer: (B) System

PROBLEM: Sentence1: What area would you like to stay in? Sentence2: I need it for 7 people. 5 nights starting Sunday. Sentence3: Which of the 2 hotels should I book for you? Sentence4: Are there any amenities that you are looking for? Parking? Internet? Sentence5: TR2021 is leaving at 20:24 would that work for you? Sentence6: I don't really have a preference for area. But I would like it to be a hotel rather than a guesthouse. And I would love free parking. Sentence7: I'd like free parking. Sentence8: How about the Ashley Hotel? Sentence9: Booking was successful, the total fee is 56.56 GBP payable at the station . Reference number is : EZIAXWCQ . Can I help you with anything else? Sentence10: Great! I'm glad I could be of help. Have a good day. Sentence11: We have ashley hotel and lovell lodge, shall I book you for one of the two? Sentence12: I am also looking for a train departing from stansted airport going to cambridge on sunday. I need to leave after 19:30. Sentence13: I'm looking for a place to stay in Cambridge, moderate price for a hotel. Sentence14: Yes, please make a booking for my group. We'll all be traveling together. Sentence15: Thank you that is all I needed today. Sentence16: Booking was successful. Reference number is L1S8JNAC . Do you need anything else? Question: Who has spoken the sentence 4? (A) User (B) System

SOLUTION: Answer: (A) User

PROBLEM: Sentence1: I was able to book your stay at the Acorn Guest House. Your reference number is SW8AC8GH . Sentence2: Great. If you think of anything else feel free to ask any time. Sentence3: Acorn Guest House is a really nice 4 star place. Free internet and parking too. Can I get you more information? Sentence4: The train ID is TR3267 and the travel time is 79 minutes. Is there anything else I can help you with or would you like to purchase tickets? Sentence5: Yes. Can you give me the train ID and the travel time? Sentence6: Okay I have found several options. Is there a particular area you want to stay in? Sentence7: There is a train departing Norwich at 21:16 on Saturday. Would this be ok? Sentence8: Thank you! That's all I needed. Sentence9: I need to book it for 6 people and 4 nights starting from the same day. Sentence10: Yes, I'd like something in the north, and in the moderate price range, please. Sentence11: There are many options. Is there a certain time you would like to leave? Sentence12: Hello I need to go to Cambridge and will be leaving on Saturday from Norwich, can you tell me what my train options are? Sentence13: I would also like to book a 4 star Guesthouse Sentence14: Yes, I would like to depart any time after 20:15. Question: Who has spoken the sentence 3? (A) User (B) System

SOLUTION:
Answer: (B) System