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: Yes. I'd like the same area and price range. Sentence2: Booking was unsuccessful, want to try another restaurant?? Sentence3: Okay I was able to get you into the Bloomsbury and your reference number is 6BOHROUH . Sentence4: No, in that case I think I would prefer to try a place that serves international food. Sentence5: I am sorry there are non in the moderate price range,I have a few in the cheap price range,would that be okay? Sentence6: Thank you, that will be just fine. Sentence7: Hi, I am looking for a north Indian restaurant in the town centre? Sentence8: Okay, how about The Varsity .. I'd like a table for four on Thursday at 12:30. Sentence9: One in the moderate price range would be good. Can you find one for me? Sentence10: I've found 9 restaurants that match what you're looking for. Would you like me to go through them? Sentence11: You're very welcome! Don't hesitate to call if you would like help finding other attractions. Sentence12: I have 2 restaurants that meet your needs: The Varsity Restaurant on Saint Andrews St. and Bloomsbury Restaurant on Downing Street. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User