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've successfully booked your rooms, and your reference number is D4TV4G4T . Sentence2: I would like a hotel to the north that is a guesthouse, please. Sentence3: Could you please tell me the price and travel time of that train? Sentence4: I sure can help with that! Can you please tell me where you will be traveling to? Sentence5: Can you reserve us some rooms? We're a party of 8 and we'd like to stay 3 nights, starting Sunday. Can you check that the train is also on Sunday? Sentence6: Thank you, That was all I needed Sentence7: Have a nice stay in Cambridge! Sentence8: I show 7 guesthouses that match your criteria. Might I suggest acorn guesthouse. They have free parking and internet. Phone number is 0122353888. Sentence9: I also need a place to stay. I need a hotel that is 4 star and of moderate price. Sentence10: I have about 11 different options. All are guesthouses. Do you have a preference on area so that we can narrow it down? Sentence11: Yes I will traveling to Cambridge and want to arrive by 14:30. Sentence12: Hi, I need a train from stansted airport that arrives by 14:30. Can you help? Sentence13: TR3659 arrives at 05:52 Sentence14: Sure, price is 10.10 pounds and the travel time is 28 minutes. Can I help you with anything else today? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User