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 need to book it for 5 people. Sentence2: I recommend Clare Hall. It is free admission, and the address is Herschel Road, CB39AL. Sentence3: I have a train on Tuesday that arrives at 18:07. I believe that would suffice? Sentence4: Book me a train from bishops stortford that arrives by 18:30. Sentence5: Thank you for calling. Have a great day and a fantastic trip to Cambridge. Goodbye. Sentence6: are you sure? i need to leave tuesday. Sentence7: There are a lot of great places to go in the west - museums, colleges, entertainment venues - what would you like to do? Sentence8: Colleges are find, can you recommend one and give me the postcode, address and entrance fee? Sentence9: I need the train to leave on tuesday and go to cambridge. Sentence10: There are no trains on Tuesday. Sentence11: Can you book it for me and get a reference number ? Sentence12: Your booking on TR1772 was successful. The reference number is YV3K20RP . The total fee of 50.5 is payable at the station. Sentence13: The only entertainment venues that I can find are colleges in the West. Is there another area you would like me to search? Sentence14: Yes I am sure. Can you change your criteria? Sentence15: You're welcome! Is there anything else I can help you with? Sentence16: I can do that for you. Can you tell me how many tickets you need to book? Sentence17: Also looking for place to go in the west. I need the postcode, address and entrance fee. Sentence18: Would you choose an entertainment venue for me? Museums and colleges seem so boring. I will need the address, postcode and entrance fee, please. Sentence19: OK, the TR0201 arrives at 18:07. Would you like to book that? Sentence20: No, I can not do that. Sentence21: That is great, thanks for your help. Sentence22: No, I think I have everything I need. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User