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: No problem, thank you for choosing Cambridge Towne Info Centre. Have a great day! Sentence2: Could you check the city center for me? Sentence3: I am leaving from Cambridge. Sentence4: I am sorry I have no listings for that type of food any other types I can look up? Sentence5: How about indian? Sentence6: Thank you. And where are you headed to? Sentence7: Yes please and a confirmation number too Sentence8: I don't have any South African restaurants at any price range anywhere in the city. Would you like to try a different type? Sentence9: Where would you be departing from? Sentence10: Great. The TR2557 arrives by 12:55, so I have booked it for 6 people. Your reference number is X56LPMKM . Is there anything else I can help you with today? Sentence11: When will you be dining and how many guests? Sentence12: I don't need a booking quite yet, could you get me the postcode? Sentence13: May I suggest Curry Garden. It is in the expensive price range and in the Centre. Would you like a reservation? Sentence14: Sure thing the postcode is cb21dp. Anything else I can do for you? Sentence15: Please help me look for a train that leaves on Friday and arrives at its destination by 1:15 PM. Sentence16: that is it for today thank you very much Sentence17: I am also looking for a expensive restaurant that serves south african food. Sentence18: cambridge and should go to norwich.for 6 people.I need the the reference number Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User