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: I would like one in the centre area, please. Sentence2: That sounds good! Can you book a table for 6 people at 12:45 on Wednesday? Sentence3: How about Eraina, which serves European food and is located in the centre of town and is in the expensive price range? Sentence4: There are no restaurants anywhere in Cambridge that describe their cuisine as "unusual." Would you like to broaden your search criteria? Sentence5: I have 5 european restaurants to choose from. I have options in the centre, north and west. Which would you prefer to dine in? Sentence6: Hmm. I'm not sure. It needs to be expensive, and I really had my heart set on unusual. Sentence7: That booking was successful, the table will be reserved for 15 minutes. Your reference number is 4OQDTI8C . Is there anything else I can help you with? Sentence8: I'm sorry, there is nothing meeting your criteria. What other type of cuisine would you like? Sentence9: You're welcome, enjoy your meal. Sentence10: I want to eat someplace with unusual food. Price is no object. What can you suggest? Sentence11: I think that is all I need. Thank you. Sentence12: Then find a European one. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System