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: There is a train every hour from Birmingham New Street to Cambridge starting at 5:40. It costs 75.10 pounds and is 163 minutes. Sentence2: You're welcome. You, too. Sentence3: Please give me a call if you need any assistance during your visit Sentence4: No, I just need the postcode and address as well as a phone number. Sentence5: OK, I have a few options, what side of town would you like that on? Sentence6: I also need a restaurant in the expensive price range and should serve european food Sentence7: Thank you for contacting us. Have a good day. Sentence8: Could you make that on the north side please. Sentence9: On Monday the TR3734 arrives by 15:23. Would you like to book some tickets for that? Or perhaps an earlier train if you think that's cutting it too fine. Sentence10: I think that would be too late. I also need it on Monday, not right now. Sentence11: I am looking for a train leaving from Birmingham New Street and arriving by 16:00. Sentence12: There is one expensive European restaurant in the north - City Stop Restaurant. Would you like to reserve a table there? Sentence13: The address is Cambridge City Football Club Milton Road Chesterton. The postcode is cb41uy. The phone number is 01223363270. Is there anything else I can do for you? Sentence14: Booking was successful. The total fee is 300.39 GBP payable at the station. The reference number is GXTXW2EM . Is there anything else I can help with? Sentence15: I think that would be good, can you get me 4 tickets? Sentence16: No that is everything I need for my trip. Thank you! Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System