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: Zizzi Cambrdige is my recommendation. Would you like to book a table there? Sentence2: I want to find a cheap Hungarian restaurant. Sentence3: A few cheap restaurants in the centre of town include Asian oriental, Chinese, Indian, Italian, Mediterranean cuisine. Do any of these interest you? Sentence4: What kind of cheap restaurants are there in the center of town? Sentence5: Thanks for using our system! Sentence6: I can make that arrival time work. Let's book it. And what is the total price and travel time, please? Sentence7: Booking for your train is successful. The total will be 68.6 for 7 people and the travel time is 47 minutes. Sentence8: I would like to depart from kings lynn. Sentence9: Unfortunately that time is not available, would you like to try another time or restaurant? Sentence10: Ooh, Italian sounds good. Sentence11: Ok, great! Can you also help me find a train going to cambridge? Sentence12: I'd like to arrive no later than 9:00 in the morning. Sentence13: Sure thing there are 1,414 trains heading to cambridge, do you have a time or location you would like to depart from? Sentence14: We have you booked for a party of 7 at zizi cambridge for 12:30. The reference number is F25II3N0 . They hold the reservation for 15 minutes. Sentence15: TR8705 will arrive in cambridge at 8:58, would you like to book a ticket for this or is that cutting it too close to your time? Sentence16: Yes please I need a table for 7 people at 13:30 on thursday Sentence17: I'm sorry, but there are no restaurants that match your criteria. Would you like to broaden your search? Sentence18: There are 19 trains that day, so you have a arrival or departure preference? Sentence19: how about 12:30 then? Sentence20: Thank you for all your help, that is all I need today. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System