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 dont happen to have anything that meets your criteria. can i try something different for you? Sentence2: I will need it for four people please. Sentence3: Yes can you help me book a hotel? Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : V6IX8TF3 . Anything else I may assist you with? Sentence5: Yes, I'd be happy to help. So for Wednesday, how many people for the reservation and what time would you like? Sentence6: I'm sorry. I don't need a hotel. I do need to make a reservation for a table at Panahar for Wednesday afternoon. Can you help me with that? Sentence7: Let me know if I can help more. Sentence8: Hello, is Panahar still serving lunch specials? Sentence9: Yes, I'm also looking for a place to stay. It should be a 2 star hotel with free wifi and parking. Sentence10: 13:30, Wednesday, 7 people. Sentence11: It is called express by holiday inn cambridge, itis in 15-17 norman way, coldhams business park post cde is cb13lh Sentence12: And what is the price range? Is it relatively cheap or pricey? Sentence13: Really? There are no 2 star hotels with wifi/parking in all of cambridge? Sentence14: Okay and what time would you like your reservation to be? Sentence15: east is find and I would need the postcode, and price range Sentence16: I think I will hold off on booking for now. Thanks for everything, that's all I need for today. Sentence17: The price range is expensive. Sentence18: The panahar is open for lunch, to find out about their specials I would suggest calling them at 01223355012. Anything else today? Sentence19: I have found 3 hotels matching your criteria. Two are in the North and one is in the East. Which area do you prefer? Sentence20: Yes what area or price range are you looking for? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User