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 booking was successful and the reference number is 1YYK3KQS . May I assist you with anything else today? Sentence2: Can you make a reservation for 1 on Monday at 17:00 at Peking Restaurant please. Sentence3: Have a good day! Sentence4: How about one that serves Chinese food? Sentence5: No, that's it. Thanks! Sentence6: There are two expensive Chinese restaurants, the Good Luck Chinese Food Takeaway and the Peking Restaurant. Would you like to book a table with either of these? Sentence7: Do the serve mediterranean food? Sentence8: No. I'm the customer and you're the help desk; It is you who are supposed to provide me with the address. But you've given me all I need, so goodbye! Sentence9: There is no expensive Mediterranean restaurant in the south. Sentence10: Do you have any recommendations for a restaurant in the south area in a high price range? Sentence11: Yes, there's the Good Luck Chinese Food Takeaway, Peking Restaurant, and Taj Tandoori. How do those sound? Sentence12: Would you provide me with the address? Sentence13: How about 16:00? Could you please provide me with the reference number also? Sentence14: I'm sorry but there was no availability for that time. Would you like to try another day or time? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User