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: Yes a hotel that is near that one. Sentence2: Thank you, that's all I need! Sentence3: May I have the reference number for the booking please? Sentence4: I apologize but the booking was unsuccessful, the hotel is booked. Do you want me to check one of the other hotels? Sentence5: Are you looking for a hotel? There are 19 4 star hotels that offer free parking. Do you have a price range or area of town you want to stay? Sentence6: I need a four star room, free parking too. Sentence7: Could I book the Marriot for 4 people starting on Wednesday? It would be for 5 nights. Sentence8: I am sorry. The Huntington Marriott is not available for those days. Would you like to try another hotel? Sentence9: The cambridge bellfry has availability. Will that do? Sentence10: I'd prefer something in the same price range as the Marriott. It's all going on an expense report anyway, no reason to be stingy. Sentence11: The hotel should be in the West side of town. Sentence12: I reserved a room at the expensive 4 star University Arms Hotel. It is in the city centre though. Reference number is A3SLP7HG . Is there anything else today? Sentence13: Is there anything in the same price range you could try? Sentence14: Great. I was happy to help. Good-Bye! Sentence15: There are 3 four star locations to choose from: Finches Bed and Breakfast, the Huntingdon Marriot, and the Cambridge Belfry. The Huntingdon is listed as expensive while the others are cheap. Sentence16: Yes, I will book 5 nights at The Marriot for 4 people starting Wednesday. Anything else I can do for you? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User