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 have 5 results of places with 3 star ratings. To help narrow it down a bit, what area do you prefer and what price range? Sentence2: bridge guest house is a moderately priced 3 star hotel in the south with internet. Do you want to make a booking? Sentence3: I am looking for places to go in the centre of town. Sentence4: Sure, how about something cheap? Sentence5: Great! Thank you for allowing me to assist you. Goodbye! Sentence6: I'm also looking for a hotel. I want a place with a 3 star rating and free wifi. Sentence7: Yes, please book me for 7 people and three nights starting on Tuesday and please also give me a reference number for the booking. I also would like a taxi. Sentence8: There are many places to go in the centre of Cambridge: marvelous architecture, colleges, museums, theatres, and more. Are any of these options particularly interesting to you? Sentence9: I'm not picky, I'm totally open to suggestions. Can you pick your favorite and let me know the address? Sentence10: Oh, wonderful. I'd recommend Club Salsa, on 1 Station Road. It's a nightclub and the entrance fee is 5 GBP, but it's worth it! Sentence11: Success! I was able to book that for you and your reference number is 8E1NHOEK . Anything else? Sentence12: Yes I need a taxi to leave the Club Salsa by 17:30 heading back to the hotel. Sentence13: Anything moderately priced in the 3 star rating, with free wifi, please. Sentence14: That's great! That's all I need. Thanks. Sentence15: A black Toyota will pick you up at 17:30 at Club Salsa to take you back to the Bridge Guest House. Contact number is 07280181013. Will that be all? Sentence16: There are no cheap hotels with that search. Would you like a different price range? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System