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: Alright. Enjoy your stay in Cambridge! Sentence2: Thank you. Have a great day. Sentence3: The train that arrives closest to 16:45 is best. I just need to know what time it leaves and arrives. Oh and of course it's ID. Sentence4: Yes. I am looking for a place to go in the west part of town. With preference to college. Sentence5: There are 6 days that arrive before 16:45 on this day. Did you have any other preferences? Sentence6: I am looking for information in Cambridge. I need a train ticket. Can you help? Sentence7: In the west part of town Clare College. The entrance fee is 2.50 pounds. Sentence8: Great that's all the information I need! Sentence9: Certainly. What is your departure location and your arrival location? Sentence10: It has been my pleasure. Feel free to contact us with any other questions you may have in the future. Sentence11: I would like to depart from London Liverpool Street and arrive in Cambridge. I would like to leave Sunday and arrive by 16:45? Sentence12: Of course! That will be TR6578 leaving at 13:39 and arriving at 15:07. The price is 13.28 pounds and it's an 88 minute duration. May I help with anything else? Question: Who has spoken the sentence 5? (A) User (B) System

SOLUTION: Answer: (B) System

PROBLEM: Sentence1: Thank You good bye Sentence2: Yes. Kymmoy is an expensive restaurant serving asian oriental food in the centre part of town. Sentence3: Thank you. May I have their phone number? Sentence4: Their number is 01223 311911. Will that be all today? Sentence5: Yes, thank you. Sentence6: There is not matching places that fits your request. Can i help you with something else? Sentence7: Are there any Asian Oriental restaurants in that price range? Sentence8: I'd like to find an expensive restaurant that serves venetian food. Question: Who has spoken the sentence 7? (A) User (B) System

SOLUTION: Answer: (B) System

PROBLEM: Sentence1: Are you looking to go by train or taxi? Sentence2: We have a train leaving cambridge at 19:40 arriving at stansted airport at 20:08. Should I book seats for you? Sentence3: Happy to be of service - enjoy your day! Sentence4: What type of attraction is is? Sentence5: Train leaving cambridge going to stansted airport on wednesday anytime after 18:45 Sentence6: There is no entrance fee for the people's portraits exhibition at girton college Sentence7: Great, thanks. I also am interested in the People's portraits exhibition at the Girton College, can you tell me more about that? Sentence8: Could you tell me if they have an entrance fee? Sentence9: TR2694 leaves at 19:40 and costs 10.10 pounds Sentence10: It's located in the west of town and is free of charge. Their phone number is 01223338901. Can I help you with anything else? Sentence11: No, not at this time. I would like to know the travel time and price, please? Sentence12: people's portraits exhibition at girton college is a museum in the west area of town. Their address is girton college, huntingdon road. Can I help with anything else? Sentence13: I need to go to the stansted airport on wednesday. Sentence14: that will be all, thanks! Question: Who has spoken the sentence 10? (A) User (B) System

SOLUTION:
Answer: (A) User