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: Yes, I'd also like to find an expensive restaurant in the west side of town. Sentence2: No that's all I need. Thanks for your help! Sentence3: Just pick one in the same area as Queens' College, and can you book a table for 1 at 18:30 on Saturday please? Sentence4: I certainly will. Thanks for the help that is all I needed. Sentence5: You're welcome. Enjoy your visit! Sentence6: Hi, what are some fun attractions in west Cambridge? Sentence7: There are 13 places, colleges, entertainment, and museums Sentence8: There are nine restaurants that fit your requirements. What type of food are you interested in? Sentence9: Your table at Graffiti is reserved for Saturday at 18:30 for one person. Your reference number is AV0KBAEG . Is there anything else I can help you with today? Sentence10: How about Graffiti? It's an expensive restaurant that serves British food in the west area. Sentence11: Graffiti sounds good. Can you book a table for me? Sentence12: Queens' College is a wonderful play to visit. Their address is Silver Street. The entrance fee is 2.50 pounds. Is there anything else I can help you with? Sentence13: Let us know if you need anything else. Sentence14: I need an attraction in the west part of town. Please provide the address and amount of the entrance fee so I can prepare. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User