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 have 3 listings for fitzbillies restaurant,the cambridge chop house and midsummer house restaurant. Sentence2: There are 7 British restaurants in the centre to choose from. Would you prefer a moderate or an expensive price range? Sentence3: There are 7 trains that can get you there, the earliest is levaing at 05:19, the latest at 08:19. Do you have a time you'd like to leave the station? Sentence4: Your booking was successful. The table will be reserved for 15 minutes. The reference number is : YONTCHWD . Is there anything else I can help you with today? Sentence5: Hm, how about we try the centre area for the polish food. Sentence6: If i remember right, I had you as a party of 8, I booked 8 tickets for TR9303. Cost is a total of 132, total reference # 011FPABG . Sentence7: Yes, I'll need tickets for my entire party. Sentence8: i will try british food Sentence9: Yes, that was correct. Thanks for all your help. My ride is here. I've got to go. Bye. Sentence10: i'd like an expensive, please. Sentence11: No, I do not care what time it leaves as long as it arrives in Cambridge by 9:30. Sentence12: Can I get a table for 8 at Fitzbillies? Thursday at 12:15, please. Sentence13: There are no Polish restaurants in the city. Would you like to try something else? Sentence14: I also need a train from peterborough on thursday. I'd like to arrive in cambridge by 09:30. Sentence15: I'm sorry, I don't have any Polish restaurants in the area. Is there anything else you'd be interested in? Sentence16: Have a nice day. Sentence17: Are there any good polish restaurants in the city? Sentence18: Let's get you on the TR9303, it leaves Peterborough at 8:19 and gets to Cambridge at 9:09. Would you like a reservation? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System