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: Train TR4373 arrives in Cambridge at 12:23. Would you like me to book that for you? Sentence2: Would you be interested in one of the 4 theatres located in the centre? Sentence3: No, no ticket needed right now. I do need the price and travel time, though. Sentence4: There are 1,414 trains to Cambridge. Where would you like to depart from? Sentence5: It is 75.10 pounds and takes 163 minutes. Sentence6: I am looking for a train that is going to Cambridge. Sentence7: I would like to depart from Birmingham New Street on Tuesday. Sentence8: Great, the theatres are Adc Theatre, Cambridge Arts Theatre, mumford theatre, and the cambridge corn exchange. Does any one of those in particular interest you? Sentence9: Also, can you please provide me with attractions in the centre? Sentence10: I think that will be everything I needed. Thanks for your help! Sentence11: Yes that would be fine. Sentence12: There are 19 trains leaving Birmingham New Street and arriving at Cambridge on Tuesday. Did you have a specific departure or arrival time? Sentence13: I would like to arrive by 19:30 Sentence14: Thanks for using our system! Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System