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 don't need a booking, just an address. Sentence2: I will need to book the hotel for 2 nights, with 8 people starting on Sunday, May 7. Sentence3: May i suggest the oak bistro? It has a moderate price range and excellent quality. Would you like me to book a table for you? Sentence4: Is there anything available for just 1 night? Sentence5: Can you find a restaurant that serves british food and is in the centre? Sentence6: The oak bistro is located at 6 Lensfield Road. Sentence7: I've found the Alexander Bed and Breakfast that would meet your needs. Sentence8: That's great! Thank you very much. Sentence9: You are very welcome. Have a good day. Sentence10: Yes, I was able to book the alexander for one night! Your Reference number is : AWHCN41U Sentence11: There are seven restaurants in the center of town serving British food. What price range are you looking for? Sentence12: I am looking for something in the moderate price range. Can you also provide me addresses? Sentence13: I'm also looking for a guesthouse with a 4 star rating. I would prefer the same area with free wifi. Sentence14: I'm sorry, but they have no vacancies for that stay. I could try a different day or perhaps just try booking one night for you. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System