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 need help finding a place to dine that is very expensive and is located in the centre. Sentence2: Just to be certain, does kymmoy share the same area and price range as Bedouin? Sentence3: Can you book that for me then? Sentence4: Thank you very much for your help. Sentence5: Yes it most certainly does. Sentence6: Booking was a success. It'll be at kymmoy and the reference number is X651IF9F . Sentence7: Unfortunately Bedouin doesn't have anything available. Would you like me to keep going down the list? Sentence8: I will just take the first one on the list. Can you make a reservation for 5 at 16:00 this Tuesday? Sentence9: Yes the next one down the list Sentence10: You're welcome. Good-bye. Sentence11: There are a variety of restaurants that are expensive and are located in the centre. Is there a food type that you are interested in? Sentence12: You're welcome. Will you be needing anything else today? Sentence13: Yes your booking reference number is X651IF9F . Sentence14: No that will be all. Thank you for all of your help. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User