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 am looking for one on the east side. However I need a indian restaurant not chinese. Sentence2: I want to leave the restaurant by 1:15. Sentence3: No thank you that is all. Sentence4: Preferably in the east. Would like the phone number. Also looking for colleges to visit and need to book a taxi for 1:15. I will need the number and car type. Sentence5: Your booking is completed. A black skoda will be picking you up, their contact number is 07824442963. Can I help with anything else today? Sentence6: At what time would you like to leave the restaurant? Sentence7: Can you tell me the address to a Chinese restaurant in Cambridge? Sentence8: any price range is ok. I am also looking for places to go in town. The attraction should be in the type of college Sentence9: There are several Chinese restaurants in town. Which specific part of town are you interested in? Sentence10: There are Indian restaurants in the centre, south, east, north, and west. Do you have an area preference? Sentence11: Sounds good. Could you give me an idea of colleges I can visit whilst in Cambridge? Sentence12: Okay, how about curry prince? It is moderately priced and located in the east. Their phone number is 01223566388 Sentence13: Sorry about that. I have 4 Indian restaurants on the east side. Do you have a price range you'd like to stay within? Sentence14: sure there's corpus christi, located in the centre and clare hall which is in the west. Sentence15: i do not have a place by your description. can we change location? Sentence16: Sure, let's do Corpus Christi. Could you get me a taxi from the restaurant to the college? Sentence17: If you need anything else, please call us back. Have a great trip to Cambridge! Goodbye. Sentence18: Price doesn't matter. What restaurant do you recommend? Sentence19: Let's actually find an Indian restaurant first. What areas of town have indian places? Sentence20: I can help with all of those but first let's find a restaurant for you. Do you have a price range? There's 2 moderate and 2 expensive restaurants. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User