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: Nados serves Portuguese sounds good can I get a address, food type, and phone number? Sentence2: Great, I have two places to recommend. Nados serves Portuguese and the Lucky Star serves Chinese. Which one do you like? Sentence3: I found Rosa's Bed and Breakfast for you. Would you like me to book it? Sentence4: Yes, I'll be staying on the South side so a cheap 4 star guesthouse with free wifi will do Sentence5: Can i just get the address please? Sentence6: The address is Cambridge Leisure Park Clifton Way and the phone number is 01223327908. Sentence7: Okay, I will go ahead and sign off then. Let me know if you need anything else. Sentence8: Excellent. I also need to find a place to stay while in town. Can you help me find a cheap hotel? Sentence9: Yes I can help. Will you be staying on the south side as well? Do you have any accommodation requirements? Thanks. Sentence10: Sure the address is 53 Roseford Road. Do you need anything else? Sentence11: I need a cheap place to eat on the south side of town. Sentence12: No, that's all I need. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User