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 don't really care. Sentence2: The postcode for the Ballare is cb23na. Would you like any other information? Sentence3: I am looking for an Italian restaurant in the centre of town. Sentence4: You are welcome. Have a marvelous time in Cambridge. Thank you for reaching out to Cambridge TownInfo centre. Goodbye. Sentence5: Great. Can I get the information about one of them? Sentence6: Booking was successful. The table will be reserved for 15 minutes. Reference number is : DL0PXR9G . May I help with anything else ? Sentence7: that is it for today thanks. Sentence8: Can you tell me if you happen to have any nightclubs in town? Sentence9: Absolutely. What price range are you looking for? Sentence10: For the reservation of the taxi, can you tell me your pickup and drop off locations? Sentence11: I'm sorry, there's someone talking here and getting me turned around. I'd like a taxi from the nightclub to the restaurant, early enough to make my reservation. Sentence12: You want a train from Ely to Cambridge, is this right? I also need a travel date and departure or arrival time. Sentence13: i have booked a yellow volvo with contact 07259480629 Sentence14: Sure the Ballare costs 5 pounds to get in and is located in the center at Heidelberg Gardens, Lion Yard. Sentence15: I also need a taxi. Sentence16: stazione restaurant and coffee bar is an italian restaurant in the centre area. would you like me to make you a reservation? Sentence17: Yes please, four people on tuesday at 18:00 Sentence18: What is the postcode for that one? Sentence19: Yes Ely to Cambridge please. Thanks Sentence20: yes we have 5 all in the centre of town. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System