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 looking for a place to stay. The hotel doesn't need to have free parking and should be in the north Sentence2: Booking was unsuccessful. Please book another day or a shorter stay Sentence3: The alpha-milton guest house is available, which is a 3 star hotel. Would you like me to reserve it for you? Sentence4: How about starting on Sunday? Sentence5: 50 to 75 dollars Sentence6: There are 11 entries in the north. What price range are you looking for? Sentence7: I'm sorry the Alpha-Minton doesn't have free wifi. I booked you into the Avalon starting Saturday, which you wanted. Sentence8: Thanks! May I have the reference number? Sentence9: when would you like to move into the room Sentence10: I would like to move in on Saturday and stay for 4 nights. Sentence11: You are more than welcome! Sentence12: I also need to make sure it has free wifi and can accommodate two people. Sentence13: Thank you very much. Sentence14: Sure! That is BANQDUCA . Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User