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 will be leaving on Thursday. Can you book and give me the reference number? Sentence2: It does have free wi-fi. I would be happy to book it for you. When will you check in, how many nights and how many guests? Sentence3: I would like to check in on Monday and stay till Thursday. Just me and my wife. Sentence4: The Thanh Binh is a cheap Vietnamese restaurant in the West, and it is located in 17 Magdalene Street City Centre cb30af. Sentence5: Would the university arms hotel work for you? They're located on Regent St, downtown. Sentence6: Will you be leaving on Thursday or will you be staying at the hotel Thursday evening? Sentence7: I apologize. I was able to book the University Arms Hotel starting on Monday for 3 nights for you and your wife. The reference number is A4FZE39M . Sentence8: As long as it has wifi.Can you book it for me ? Sentence9: Thank you. Good bye. Sentence10: Are you sure you can't find me a hotel in the centre area, 4 stars, free wifi with availability for 2 people for three nights starting on monday? Sentence11: May I have their phone number please? Sentence12: No that's all the information I need for now. Thank you very much, have a nice evening. Good bye. Sentence13: I was unable to book, do you want to add a day? Sentence14: Their phone number is 01223362456. Can I help you with anything else? Sentence15: Hello. I need a place to stay in Cambridge, in the centre that is 4 stars. Sentence16: Thanks! I'd also like a vietnamese restaurant. A cheap one, though. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System