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 sorry, it doesn't look like Loch Fyne has tables at that time, and they're the only one that focuses on seafood. Would you like to try somewhere else? Sentence2: Your booking was successful. Your reference number is BTY06386 . May I help you with anything else today? Sentence3: Could you help me find an expensive restaurant in the centre? Sentence4: You are welcome. Enjoy your dinner. Bye. Sentence5: No thank you that is all I needed. Goodbye. Sentence6: There are 33 in that area. Please choose a food type. African, Asian, British, Chinese, European, French, Gastropub, Indian, Japanese, Korean, Mediterranean, North American, Modern European, Seafood, Thai, or Turkish. Sentence7: Ok, I can book at Bedouin if you would like? They serve african food. Sentence8: I want to try Seafood. Can you book for 4 people at 17:45 on Thursday? Sentence9: Please try booking any different restaurant in the same area and price range as Loch Fyne. Sentence10: Ok I have booked a table for 4 at Bedouin on Thursday at 7:45. Sentence11: Could you please give me the reference number? Sentence12: Yes,and book it for 4 people on Thursday at 7:45,thank you. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System