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 TR4673 leaves at 19:29, you'll arrive by 20:07. Would you like to book it? Sentence2: Can you tell me if they have a table for 8 available at 12:45 Monday? Sentence3: I'm leaving from cambridge, and I need to go to bishops stortford. Sentence4: Wait, I need to change the booking to friday. Sentence5: Yes they certainly do. I made you a reservation for Monday and your reference number is 8V5QECRH . Sentence6: Yes, What would you like to know about it? Sentence7: Thank you very much! Sentence8: enjoy your stay in Cambridge! Sentence9: No problem; I've updated your reservation to Friday. Your new reference number is RJQO3OZ0 . Can I help with anything else? Sentence10: Thank you for all your information. Enjoy your lunch at Pizza Express Fen Ditton. Sentence11: I'm looking for a restaurant called pizza express Fen Ditton, do you have any information on it? Sentence12: Yes, I would like to reserve seats on that train. Same group from the restaurant. Sentence13: Sure I can help you with that. Where would you like to depart from? Sentence14: Yes, I also need a train after 18:15 on Saturday. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System