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: kohinoor. i want to book a table for 2 people at 16:45 on Thursday Sentence2: Nope, I'm all finished for today. Thanks so much, goodbye now! Sentence3: Sure. Booking was successful. The table will be reserved for 15 minutes. Reference number is : X9AVZ8EI . Can I help with anything else today? Sentence4: Absolutely. What is the name of the restaraunt you are interested in? Sentence5: You are very welcome, bye! Sentence6: I need to find some information in a particular restaurant. Are you able to look up a specific place? Sentence7: I also need a Thursday train. Sentence8: Depart from Ely and would like to arrive by 13:00 in Cambridge. I need to book it for 2 people I also need a reference number. Thanks Sentence9: What location will you depart from and where are you headed? Sentence10: Sure thing, it's booked and your reference number is PWSVK4XQ . Do you need more help? Question: Who has spoken the sentence 6? (A) User (B) System

SOLUTION: Answer: (A) User

PROBLEM: Sentence1: Galleria serves European food and is in the centre part of town and has a moderate price range. Sentence2: No restaurants serving australasian food can be found. May I find another type restaurant for you? Sentence3: Looking for someone that serves Australasian food? Sentence4: How about European food? Question: Who has spoken the sentence 3? (A) User (B) System

SOLUTION: Answer: (B) System

PROBLEM: Sentence1: There are so many to choose from. Any idea what kind of attraction you would like to visit? Sentence2: It will just be a table for one. Go ahead and book it Sentence3: Yes, I would like to go to a college with free admission. Sentence4: How many will be at your table? Sentence5: sure thing it is cb23bu, anything else today? Sentence6: Yes, I'd like to find a cheap Chinese restaurant. Sentence7: The reference # is 4ZBQs5GE . Need anything else? Sentence8: There are 10 colleges in the centre with free admission. Would you like me to suggest one? Sentence9: I'm looking for an attraction in the centre. Sentence10: What is that college's postcode? I'm also hungry and want somewhere to eat. Sentence11: Great, that's all I need...thanks so much! Have a great day! Sentence12: There are four options, charlie chan is in the centre near the college that you are visiting, shall I book you? Sentence13: Yes please book it for monday at 11:15 Sentence14: Can you give me the postcode for Christ's College? Sentence15: You are welcome. Glad to be of assistance. Enjoy your stay in Cambridge. Bye. Sentence16: Christ's college have a free entrance Sentence17: I also need a taxi that will arrive by the booking time. Sentence18: Booked car type : white ford Contact number : 07018249902 Question: Who has spoken the sentence 15? (A) User (B) System

SOLUTION:
Answer: (B) System