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 afraid not. Could you like to try any other food type or price range? Sentence2: There is one option. It is riverboat georgina. Can I help you further today? Sentence3: That is all. Thank you for your help. Sentence4: Please tell me the postcode Sentence5: I would suggest hakka Sentence6: Could you look for something Chinese with the same criteria? Sentence7: I have a table for 8 people on Thursday at 12:00, your reference number in PBGQ796L . Can I help with anything else? Sentence8: Could you tell me if Cambridge has any expensive Austrian restaurants? Sentence9: I'm sorry but I'm not able to find anything that matches those specifications. Would you like to try another type of food? Sentence10: Are you sure there's no expensive Austrian food in the north? It's what I'm really set on. Sentence11: I am also looking for a boat in the North of town. Sentence12: That sounds good - can you book a table for 8 at 12:00 on Thursday, please? Sentence13: Sure thing. The postcode is cb43ax. Is there anything else I can assist you with? Sentence14: You are most welcome. Enjoy your day! Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User