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: Your taxi is booked, look for a blue ford, phone number is 07891245613, any other questions? Sentence2: That is everything. Thank you for your help. Sentence3: I need a taxi to go between the guesthouse and the college. I want to leave the college by 07:30. Sentence4: Um really? There is no 4 star accommodations with free parking in all of Cambridge? I have a hard time believing that. Sentence5: I am still getting no results. How else may I help you? Sentence6: I am looking for the saint catharine's college Sentence7: I found that info st catharines college is located at kings parade, has free entrance and its phone number is 012233338300. Can I help you with anything else? Sentence8: Could you look again, 4 star and free wifi, does not need to be hotel can be any room. Sentence9: I need hotel tips, can you help? Sentence10: I definitely can help with that. Do you have a price range in mind? Sentence11: Sorry, there aren't any. Could I check for something else? Sentence12: Are there any places to stay that offer free wifi? Sentence13: I don't have a price in mind. As long as it has free wifi and parking, I just need the name, area, and type please Sentence14: I apologize, we actually have 19 options matching your query. Do you have a preference for price range? Sentence15: Okay, have a great time in town! Sentence16: No, price doesn't really matter. I do prefer 4 stars though, and free parking. Sentence17: What about with wifi and no parking? Sentence18: I'm sorry. It appears that there are no four star hotels in Cambridge with free parking. Can I help with something else? Sentence19: The acorn guest house is a guesthouse in the north. May I help with anything else ? Sentence20: I'm sorry, there really are none that match your criteria. Are you sure you don't want to lower your star rating? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User