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: Unfortunately there are no British restaurants in the South in that price range. Would you like to try a different type of food? Sentence2: Oh, no, I need a train that leaves from Birmingham new street and go to Cambridge. Sentence3: Hi, I need to catch a train after 14:15 on Thursday. Sentence4: No thanks. I have all I need now. Have a good one. Bye. Sentence5: No but can you give me the address, postcode and phone number for the Peking Restaurant please? Sentence6: Sure. Peking Restaurant, 10 Homerton Street, City Centre cb28nx, Phone: 01223354755. Is there anything else I can help you with? Sentence7: There is a train that departs cambridge and arrives at london kings cross on friday. Sentence8: How about TR8121? It leaves at 14:40. Sentence9: There are two with your preferences, The Good luck Chinese takeaway and Peking Restaraunt. Both are in the South, would you like me to book one of those? Sentence10: It arrives in Cambridge at 17:23. Sentence11: British food would be my preference. Sentence12: The cost is 75.10 pounds per ticket. The travel time is 163 minutes. As far as restaurants I have 5 available. Which type of food would you like? Sentence13: What time does it arrive? Sentence14: Have a good day. Sentence15: I'll need to know the price and travel time, and I am also looking for an expensive restaurant in the south. Sentence16: Okay, how about Chinese food. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User