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: Are there any vietnamese themed restaurants in the west side of town? Sentence2: Yes, Thanh Binh. Do you want a reservation there? Sentence3: no thanks. i have all the info i need. have a good day. bye. Sentence4: the TR6898 train has a travel time of 17 minutes and arrives at cambridge at 15:52. Would you like to book that train or get more information? Sentence5: What is your departure station please? Sentence6: I want a car to get me to Cambridge, arriving by 14:00. Sentence7: Sure! What is your departure area and your destination? Sentence8: Please ignore my last post, I was distracted. I need to leave Ely and get to Cambridge by 16:00. Sentence9: The booking was successful. The table will be reserved for 15 minutes. Your reference number is : EP1XT4JY . Is there anything else I can do to assist you? Sentence10: What day are you looking to book train on? Sentence11: I'll be departing Monday. Could you tell me the travel time of the train? Sentence12: Yes. I also need to book a train. Sentence13: You are welcome. Enjoy your visit. Sentence14: Sure, I'll need a table for 3 at 19:45 on Monday please. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System