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: Are there any hotels that offer both free parking and free wifi? Sentence2: Great, thanks! That is all for now. Sentence3: I need it to be in the cheap range. Thanks for helping me with this! Sentence4: Almost every place in Cambridge meets those requirements! Do you have an area or price range in mind? Sentence5: May I just get their phone number please. I am also going to need a taxi. Sentence6: You're very welcome. We have ten great, inexpensive guesthouses spread throughout Cambridge, such as our Alexander Bed & Breakfast which is rated 4 stars. Sentence7: Glad to help. Enjoy your visit. Sentence8: Yes of course, the Shanghai Family Restaurant is located in the centre of town, would you like me to book it for you? Sentence9: I am also looking for the Shanghai family restaurant Sentence10: That sounds great. I would like to book that for 8 people and 4 nights starting from Tuesday. Sentence11: Booking was successful. Reference number is : IQ8WDOKB . Is there anything more I can help you with? Sentence12: I've booked a black honda for you. The contact number is 07084963980. What else would you like today? Sentence13: I want to leave the hotel at 11:15 and go to the restaurant. Please give me car type and contact number too. Sentence14: Their phone number is 01223301761. Where are you headed in your taxi? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System