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: How many days and how many people? Sentence2: There is only 1 hotel in the area of west that is expensive. Would you like me search a different area? Sentence3: Okay. I booked you into the Gonville Hotel in the city center and your reference number is TSJA02XZ . Sentence4: Any area is fine, just in the same price range is what matters to me. Sentence5: Can I get it for three nights. There will be two of us. Sentence6: I cannot reserve a room at that time, perhaps another hotel? Sentence7: Thank you using the Cambridge TownInfo service, and enjoy your stay in our city! Sentence8: I am looking for an upscale hotel. Sentence9: I need the hotel to be in the west part of the city and have free parking please. Sentence10: Yes something else in the same price range please. Sentence11: No, thank you. That was all I needed. Sentence12: Is there anything else I can do for you today? Sentence13: The Huntington Marriott Hotel is the only expensive hotel in the west. Sentence14: If it has free parking, I would like to book it for wednesday please. Sentence15: Gonville hotel is in the expensive price range. Sentence16: Thank you so much for your help. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User