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 9 trains that meet your criteria that day, one leaving every hour from 05:32. Do you have a departure time preference? Sentence2: I would like to arrive by 15:30. Sentence3: I'm sorry, I meant that I need 5 ticket for the train booked. Can you fix this? Sentence4: Where would you be departing from? Sentence5: Could you leave on Friday? There are no trains available on Saturday from Ely to Cambridge. Sentence6: 8 tickets for the TR7846 leaving at 09:32 your reference number is D0CG7JD3 . Anything else today? Sentence7: No, we just want to get there either at or right before 15:30, please. Can you get me 8 tickets on the closest train to that time? Sentence8: There are about 19 trains available. I can narrow that down some if you tell me if you want to leave or arrive by a certain time. Sentence9: I will be departing from Ely. Sentence10: I'm looking for a train to cambridge on Saturday. Sentence11: Sorry, I misspoke. I am actually departing from Broxbourne. Sentence12: Yes sure. I booked that for you for 5 people and the reference number is IFXPNYHS . Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System