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: There are five european restaurants, which area would you like to dine in? Sentence2: Booking was successful. Your reference number is KANPYWAC, Sentence3: The area doesn't matter. Can you make a recommendation, please? Sentence4: Unfortunately Eraina is not available at that time. Would you like to try the City Stop Restaurant? Sentence5: How about 17:00? Sentence6: Thanks, that is all I need today. Sentence7: I would like to eat at an expensive european food restaurant Sentence8: The address for the restaurant is Cambridge City Football Club Milton Road Chesterton and the phone number is 01223363270. You will fond the restaurant in the North area of town. Sentence9: Sure, that would work. Sentence10: Great, Can you book me a table for 2 at 18:00 on Monday? Sentence11: Please book another day or time slot. the place could be full Sentence12: I would recommend Eraina, it is at Free School Lane City Centre. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System