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 matches the criteria you are looking for. Would you like to make reservations? Sentence2: I have 9 entries, all of them are guesthouses. Is that acceptable? Sentence3: I'm sorry but there are no hotels available with those specifications. Would you like to look in a different area? Sentence4: No I am sorry all that are available are guesthouses Sentence5: It doesn't matter where the guesthouse is! I'm sorry, a hotel or guesthouse is absolutely fine, the only thing that matters is free parking, 4 stars, and in the moderate price. Sentence6: Several good choices come to mind, what part of town are you looking to stay in? Sentence7: Yes. Monday, two nights three people. Sentence8: any part but should have free parking and moderately priced. should also be a star of 4 Sentence9: No, sorry I don't. Would you like to try a different area? Sentence10: Do you have any thing that is not a guesthouse in other areas? Sentence11: Do you have any of the guesthouses in the centre? Sentence12: Would you like me to book it for you ? Sentence13: Yes please. There's 3 of us and we want to check in on Monday and stay for just 2 nights Sentence14: I'm looking for a place to stay in Cambridge. Where would you recommend? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System