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've heard good things about Clowns Cafe. Do you have the address? Sentence2: That is all I needed. Thanks for all your help! Sentence3: Oh, how disappointing. There are no expensive persian restaurants in the center of town? Sentence4: You're welcome, have a safe trip. Sentence5: I have you leaving by that time in the black Honda. May I help with anything else? Sentence6: There are 5 in that area: Ballare, Club Salsa, Kambar, Soul Tree Nightclub, and The Fez Club. Would you like more information about 1 of these? Sentence7: Is there a italian restaurant in the centre of town in the expensive range? Sentence8: All of those sound great. Can you recommend one and just give me the postcode and entrance fee? Sentence9: The ballare is perfect. cb23na is the postcode and the entrance fee is 5 pounds. Sentence10: Clowns Cafe is located at 54 King Street City Centre. Sentence11: Booking completed! Booked car type : black honda Contact number : 07608331864 Is there anything else I can help you with? Sentence12: I am looking for a Persian restaurant with expensive price range food. Sentence13: No, I am afraid I have no listing for one. Would you like to try another area or pricerange? Sentence14: Do you know of any nightclubs in the area? Sentence15: Yes there are 4 italian restuarants that are expensive in the centre of town. Stazione, Clowns Cafe, Don Pasquale Pizzaria, and Cafe Uno. Would you like a reservation? Sentence16: Thanks. Now can you have a taxi take me from the restaurant to Ballare? I want to leave after 18:30. I'll need car type and contact number too. Sentence17: Unfortunately I can't find any matching records. Could you like to try any other food type? Sentence18: Thanks for that! Can you double check when the car is picking me up? I think I misspoke - I'd like to leave the restaurant by 18:30, not after. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User