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: Please book that one for 7 people. Sentence2: I also need a place to stay in the east area. Sentence3: No, that will be all. Thank you! Sentence4: Thank you for using Cambridge TownInfo. Goodbye! Sentence5: How about on Monday? Any train leaving after 19:00? Sentence6: I would recommend TR6223 which leaves Leicester at 19:09 and arrives in Cambridge by 20:54. Sentence7: I have 7 places to stay in the east. Did you have a certain price range or other preferences? Sentence8: There is a train leaving at 5:09 on Friday and arriving at 6:54. Sentence9: I have the warkworth house located at warkworth terrace. Would you like reservations? Sentence10: Yes please for 7 people and 2 nights starting on Friday. Sentence11: Done! Your reference number is 02RUTRTJ . Can I help you with anything else? Sentence12: Need to know the train schedule from leicester to cambridge Sentence13: I would like a 4 star hotel in the moderate price range that includes free parking. Sentence14: Your booking was successful. Your reference number is X16ZO0Y8 . Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System