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

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I have it booked for you. The reference number is LK03FYO8 . Sentence2: Thank you! I also need info on a train. It should leave on friday after 12:45. Sentence3: Yes, and please let me know the expense and travel time. Sentence4: curry prince is one that fits your needs Sentence5: I'm going to peterborough. Sentence6: I have a train leaving at 13:06 and arrives in peterborough at 13:56. Would you like to book that train? Sentence7: Yes I am looking for a restaurant in east cambidge that serves indian food Sentence8: Okay, I can help you find a train. What is your destination? Sentence9: Actually, I don't need tickets just yet. I'm all set here. Thanks for all your help - goodbye! Sentence10: Goodbye, I hope you enjoy your trip! Sentence11: It is 16.50 pounds and the travel time is 50 minutes. How many will the booking be for? Sentence12: I will want it for five, on Thrusday, 15:15 Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System