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'm looking for a cheap restaurant that serves world food? Sentence2: I can get a table for you at da vinci pizzeria. This is the only other place to eat in that area. Reference number is W6MFU6XD . Sentence3: Yes. Can you look for something in the same area and price range please? Sentence4: There are two Indian restaurants, the nirala and royal spice. The royal spice is in the cheap range and the nirala is in the moderate price range. Sentence5: I need a booking for 2 people at 17:30 on tuesday. Sentence6: The only restaurants in the north serve Asian Oriental, Chinese, European, French, Indian or Italian food. Would you like to change to one of those? Sentence7: The restaurant should be in the north. Sentence8: Booking was unsuccessful. Would you like to find another restaurant? Sentence9: That is perfect. Thank you for all the help! Sentence10: Thank you for using our system! Sentence11: Unfortunately there are now restaurants that meet those specifications. Would you like me to look for a different kind of food? Sentence12: What day would you like this reservation to be available for? Sentence13: Tell me about the Indian restaurants in the north then please? Sentence14: Can you book me a table for two at the Royal Spice? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System