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: The acorn guest house will do nicely. I would like to book 4 nights starting Monday accommodating 4 guests. I will need the reference number. Sentence2: I have 38 trains that meet your criteria. Did you have a preferred departure time? Sentence3: TR9063 leaves at 13:48. Would you like to book it? The next departure is at 14:19. Sentence4: I need to book a train for Monday. Sentence5: Ok, thanks for that information. I would also need assistance finding a hotel in the north part of town. Sentence6: Glad I could help you today. Enjoy your stay in Cambridge! Sentence7: I would like to depart from Peterborough going to Cambridge. Sentence8: There are 13 hotels in the north of town. Do you have a price range or star preference? Sentence9: Possibly, what is the price, arrival time, and travel time for TR9063? Sentence10: Ideally it should leave after 13:45. Sentence11: Is it expensive, though? Sentence12: Where are you departing from? Sentence13: TR9063 arrives in Cambridge at 14:38. Total travel time is 50 minutes, and the fee is 16.50 GBP per ticket. Sentence14: The acorn guest house is a four star hotel. Would you like to try that one? Sentence15: The booking is successful, reference number is Y2ATA7D2 . Sentence16: Thank you very much. I think that is everything I need then. Sentence17: The acorn guest house is moderately priced, but there are two more inexpensive guesthouses available if you would prefer. Sentence18: I would like to stay in an expensive hotel, I know that for sure. I am not too concerned about missing out on amenities such as free parking and WiFi. Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User