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: Archway house does have free parking, would you like me to book it for you? Sentence2: Great, how about the Archway House? It's in the North, moderate price, and 4 stars. It also has internet. Sentence3: No, that's it. Thank you! Sentence4: The postcode to Archway House is cb43pe and the phone is 01223575314. Would you like me to book this for you? Sentence5: Not at the moment. What is the postcode? Sentence6: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence7: There are 15 results for guesthouses in the moderate price range, what area are you looking to stay in? Sentence8: I would love to book a taxi to commute between the two places. I want to leave the attraction by 08:45. I need contact number and car type please. Sentence9: I am looking for a college type attraction. Sentence10: A blue BMW will pick you up, contact number 07646838374. Is there anything else I can help you with? Sentence11: Sure. There are a number of college attractions to visit. Is there a specific place or area of the city you were interested in? Sentence12: none. just recommend one and let me know its entry fee. Sentence13: How about king's college? It's in the centre of town and the admission is free. You can contact them at 01223331100. Sentence14: The area doesn't matter, but I would like 4 stars, please. Sentence15: do they also have free parking? Sentence16: Great! I also need a moderate priced guesthouse. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User