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: Thank you for using our system today! Sentence2: Cambridge Arts sounds good, can I get the phone number? Is there any entrance fee? And then a nice expensive dinner in the same area please. Sentence3: What are your ideas? what area of town and what type of attraction? Sentence4: we have wagamama located in 36 Saint Andrews Street. can i book for you? Sentence5: Booking completed! Booked car type : grey volkswagen Contact number : 07275251696 Can I help with anything else today? Sentence6: I'm looking for a theatre in the centre. Sentence7: There are four theatres in Centre: ADC Theatre, Cambridge Arts Theatre, Mumford Theatre and The Cambridge Corn Exchange. Would you be interested in any of these? Sentence8: I am looking for something entertaining in town later and I've got some things in mind. Sentence9: Hmm, I'll try Japanese instead. Sentence10: Cambridge arts theatre phone is 0122350333, no entrance fee information is available. There are 33 restaurants in your price range, do you have a food type preference? Sentence11: No thank you I just need the postcode. Sentence12: I am sorry but there are no Cuban restaurants available. Would like another type of food? Sentence13: Yes, I like there to be Cuban food. Sentence14: That will be all today. Thank you. Sentence15: Can you book me a taxi that will pick me up from Cambridge Arts Theatre at 07:15 and take me to Wagamama? Sentence16: The post code is cb23ar. Is there anything else I can help with? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System