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 recommend, the gallery at twelve a high street, their postal is cb15dh, any further questions? Sentence2: Ok. Leverton House guest house sounds fine. Can you book it for 2 nights on Monday? There will be 7 people. Sentence3: I'm confused. I need a taxi between the two places that leaves the hotel by 2:30. Can you help me with that? Sentence4: There are many can I get a price range please? Sentence5: There are six guesthouses that meet your needs. I have heard wonderful things about Leverton House on Newmarket Road. Would you like me to make a reservation? Sentence6: I am planning a trip to Cambridge. Looking for a place to stay in the East! Sentence7: Thank you for contacting us and have a nice day. Sentence8: Could you find me a museum instead? Sentence9: I am not finding any that meet your requirements. Is there something else you are looking for? Sentence10: I am not particular as along as it has 4 stars and free wifi. Sentence11: Sure we have many colleges to choose from. Would you like a recommendation? Sentence12: Please provide me with a Taxi that can arrive by 2;30, I would like a phone & reference number. Sentence13: There aren't any colleges located in the east. Do you want to search in other areas or do you want to find a different kind of attraction? Sentence14: Could you help me find a college in the east to tour? Sentence15: Your booking for Leverton House was successful. The reference number for this stay is 8RX4FFKM . Is there anything else I can help you with? Sentence16: I prefer a hotel, is there a hotel in this area that is 4 star? Sentence17: Thank you very much! That is all I need. Sentence18: I need also a taxi to leave the hotel by 2:30 Sentence19: Yes, please. And I will need the postcode for it. Sentence20: Booking completed! Booked car type : white ford Contact number : 07492685180 Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User