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 have a listing for la tasca in the centre area,can I book you a table there? Sentence2: You're welcome. Please call again. Sentence3: Okay, again for 6 people Sunday at 17:00. Sentence4: I was unable to find a table at that time. Would you like to find another restaurant? Sentence5: The Copper Kettle is a British restaurant in the centre area with a moderate price range, would you like me to book that for you? Sentence6: There are no other Spanish places in that area, another area or type perhaps? Sentence7: Sure. That sounds like a nice place. Go ahead and book that for me. Sentence8: What day and time are you looking for? How many people will be in your party? Sentence9: Any in the same area, and price range please. Sentence10: I need a table for 6 people Sunday night at 17:00. Sentence11: Can you find me something along the same price and in the same area please? Sentence12: OK, that's all I need today, thank you! Sentence13: I'm looking for mid range spanish restaurants, can you help me? Sentence14: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 840ZVK1R . Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User