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: There are five trains that meet your needs. Te earliest arrives by 19:01, the latest arrives by 24:01. Would you like me to book a seat for you? Sentence2: I can help you with that, where will you be departing from? Sentence3: Broxbourne. And is should have free parking in the CHEAP price range. I am very frugal Sentence4: What is the postcode? I want to make sure I don't have any enemies in the area. Sentence5: I also need a 4 star hotel with free parking. Sentence6: The post code for the cambridge belfry is: cb236bw Sentence7: May I please have the price first? Sentence8: I will be departing from Cambridge, going to Broxbourne. I would like to leave after 17:45 on Thursday. Sentence9: The ticket price is 17.90 pounds.What else may I do for you? Sentence10: There is The Cambridge Belfry located in the west. I'm not sure if this is the area you're looking for. Would you like more information? Sentence11: Hi, could you possibly help me find a train for my upcoming trip? I've been put in charge of the plans. Sentence12: I have three hotels that meet your needs. Is there a specific area you'd like to be in? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System