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: Ok I will book it for you Sentence2: Yes please. Two nights from Tuesday for two people. Sentence3: The TR3677 arrives at 17:58. Would you like to book it? Sentence4: I need a room for the same group of people for 1 night on the same day. And I need the reference number then too please Sentence5: I got your room booked at the Carolina Bed and Breakfast. Your reference is FYLDIZUF . Is there anything else I can help you with today? Sentence6: Okay, I think I can help you. Where will be coming from? Sentence7: Can you help me find a train going to cambridge that arrives by 18:30? Sentence8: Thanks so much. Can you also help me look for the Carolina Bed and Breakfast? Sentence9: Carolina Bed and Breakfast is in the East, it is a guesthouse in the moderate price range. Would you like to book a room? Sentence10: I will be departing kings lynn. Sentence11: Yes for 2 people on a Tuesday please. And I would like the reference number. Sentence12: I'm going with TR5793 since you are travelling on Tuesday arriving at the same time. The total fee is 19.6 GBP payable at the station . Reference number is : 4NLGW7WM . Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User