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 am sorry I am actually looking for a 4 star hotel with free parking. Is there any available? Sentence2: Okay. That will work. I'll need to book it for Thursday, 3 nights, and 7 people. Sentence3: I have not hotels matching your criteria. Sentence4: I have booked the University Arms Hotel for you for Thursday, 3 nights, and 7 people. Is there anything else I can help you with? Sentence5: I'm looking for a moderately priced hotel that offers free wifi. Do you have any of those? Sentence6: Can you locate me a 3 star hotel with parking. Sentence7: please give me the reference number for the hotel Sentence8: Could you check again? A moderate priced, 4 star hotel or guesthouse, that offers free wifi and parking. Sentence9: I'm sorry, but I am still not pulling any matches up. Sentence10: the university arms hotel is located on regent street and is expensive. Sentence11: I have several options that meet your criteria. One is in the centre with 0 stars, two in the north with 2 stars. Sentence12: none in our list. can you change location? Sentence13: I will get that for you Sentence14: Are there any 4 star hotels or guesthouses with free parking and wifi in a different price range? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User