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 i don't have anything that meets all those criteria. is there anything you'd like to change? Sentence2: Yes, I need internet and free parking. Sentence3: Yes, please. I would also like the reference number. Sentence4: Sure, we have many. Are you looking for anything else specifically? Sentence5: I'm looking for a guesthouse to stay at that has a 4 star rating. Can you help? Sentence6: There are no hotels that meet that criteria. Would you like to search for something else? Sentence7: A moderate price range. I need 2 nights beginning Monday and the reference number. Also looking for a train, same people same day as hotel and reference number as well. Sentence8: i need an expensive hotel in the north Sentence9: Yes, I would like to be in the north. Oh and I would like to be in the expensive price range. Sentence10: Would you like me to book it for you ? Sentence11: One more time let me know exactly what you need by looking at what you wrote down on your right, so we can book you. Sentence12: May I recommend the Acorn Guest House at 154 chesterton road. Would you like me to book a room for 1, for 2 nights starting Monday? Sentence13: To help narrow this down, can you tell me what area of town you'd like most? Sentence14: I prefer a guesthouse please. I only need it for myself for 2 nights starting from monday. Sentence15: Is there something else I may be able to help you with today? Sentence16: No I will figure something out Sentence17: There are 9 options. Do you prefer a guesthouse or hotel? Sentence18: I lied. I don't need free internet and parking. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User