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: Acorn guest house is in the moderate price range, are you looking to book in that pricerange then? Sentence2: Acorn guest house has good ratings would you like to stay there? Sentence3: Is it in the north? I need to be in the north area of the city. Sentence4: I'm sorry, there were no rooms available. Would you like to find another hotel? Sentence5: I do not need free parking. Sentence6: I need a place to stay please. A guesthouse would be great. Sentence7: Will you be needing free parking? Sentence8: Yes, please book starting Thursday for 4 people and for 4 nights. Sentence9: Yes, Acorn Guest House is a 4 star guest house with free internet and free parking in the north part of town. Should I book it for you? Sentence10: The Acorn is not available but I went ahead and booked the alpha-milton guest house. Your reference number is SJZ9ZJ8V . Sentence11: You are welcome. Enjoy your stay. Sentence12: Good. Thanks for your help. Sentence13: Could you try another hotel in the same price range and, if you make a reservation, give me the reference number? Sentence14: Yes, that would be fine, moderate price range. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User