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: Wonderful. Thanks for help. Sentence2: I also need a taxi to pick me up from Milton Country park by 20:30. Sentence3: Would you like me to go ahead with booking at city stop restaurant? Sentence4: European sounds good! Sentence5: I have booked a taxi for you for 20:30. Look for a yellow bmw. Contact number is 07961088935 Sentence6: I have five restaurants matching your request. Would you like Asian, Chinese, European, or French food? Sentence7: Okay, thank you. What is the entrance fee? Sentence8: Not right now. Can you give me their address and postcode? Sentence9: My destination is City Stop Restaurant. Sentence10: there is milton country park in the north, it's in the address milton country park, milton. Sentence11: If you need anything else, we're always here and ready to help! Sentence12: Sure, city stop restaurant, Cambridge City Football Club Milton Road Chesterton cb41uy, phone 01223363270. Would you like to book a table? Sentence13: No thank you. Are there any parks in town? Sentence14: Entrance is free at Milton Country Park. Sentence15: I can book a taxi for you but will need to know your destination in order to book it for you. Sentence16: I am looking to find an expensive restaurant in the north area of town. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User