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: No, I'm sorry, there are no Sri Lankan restaurants in the moderate or the expensive price range. Can I help you find something else? Sentence2: Yes, please try a different restaurant in the same area and price range. Sentence3: Okay great! Enjoy your lunch. Sentence4: Could you help me find a restaurant that's moderately priced, and services sri lankan cuisine? Sentence5: Nope, that should do it! Thanks! Sentence6: I'm sorry, I was unable to book the restaurant. Would you like to try a different restaurant? Sentence7: Yes, is there another restaurant serving lebanese food that you can recommend? Sentence8: I was able to book you at the oak bistro. your reference number is 11WH7X3K . Is there anything else I can help you with? Sentence9: I'm sorry, I don't see any moderately priced sri lankan restaurants. Would you like to try another sort of cuisine? Sentence10: Yes. Ali baba serves lebanese. May I book a table for you? Sentence11: yes see if there is booking for 6 people at 11:15 on thursday. Sentence12: Yes, are there are restaurants with lebanese cuisine? Sentence13: No I am sorry the ali baba is the only one. Another place maybe? Sentence14: Do you have a moderately priced restaurant serving lebanese food? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System