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 am sorry but I have nothing in that area for sports. Would you like to try another area or attraction today? Sentence2: Thanks! I think you covered everything I need. Have a good one. Bye. Sentence3: I also need a restaurant in the same area. Sentence4: Yes, I'd like the post code. Also, if you can't get it for Christ's College, do you know the entrance fee for Downing College, by any chance? Sentence5: Yes, Christ's College. What is the entrance fee for that college? Sentence6: Sure, there are many nearby, do you have a type of cuisine you are looking for or a price range to look at? Sentence7: I'd like something moderately priced. Sentence8: OK, are there any colleges in the center of town? Sentence9: I'm looking for some place to go in the town centre. Something sports related. Sentence10: Thank you for using Cambridge TownInfo centre. Please contact us for your future travel needs. Sentence11: There are 13 colleges in the centre area. Christ's College and Downing College are two of these, would you like some more information on one of these? Sentence12: The yippee noodle bar is in the centre and moderately priced. Would you like more information? Sentence13: I'm sorry, I cannot look up the entry fee to Christ's College. Is there anything else I can do for you today? Sentence14: The postcode of yippee noodle bar is cb11lh. Christ's college is free to enter. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System