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 the train to leave after 09:15 on Saturday. Sentence2: Are any of the 29 places, guest houses? I would actually prefer a hotel rather than a guest house. Sentence3: I have train TR2755 that will leave at 09:40 and put you at the airport by 10:08. Would that work for you? If not, I have later trains. Sentence4: I have 29 places to stay with free parking. Is there a price range you'd like to stay in? Sentence5: I want a train that goes to stansted airport and leaves from cambridge. Sentence6: I also need a hotel that has free parking. I don't need internet or anything like that. Sentence7: Would you like me to book this train for you? Sentence8: Your reference number is UKOTND0A . Would you like anything else today? Sentence9: There are 8 hotels that match that description. Did you have a price range or area in mind? Sentence10: That train works well. Sentence11: There are many that leave cambridge and go to stansted airport; what day would you like to leave and what time? Sentence12: Yes please. Get me 8 tickets for my party as well as a reference number. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System