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: Carolina Bed and Breakfast is a 4 star Guesthouse located in the East. At a moderate price point it boasts both free wifi and free parking. Need more information? Sentence2: Can you help me find a restaurant in the centre of town serving Italian food? Sentence3: Zizzi Cambridge is at 47-53 Regent Street and the postal code is cb21ab. Can I help you with anything else? Sentence4: I think I will try Zizzi Cambridge. Could I get the address and postcode? Sentence5: Maybe... is there any other place that's cheap and serves Italian food? Sentence6: Yes I am looking for a particular hotel called the Carolina Bed and Breakfast. Sentence7: There is also Pizza Express, it is an expensive restaurant, or you could try Zizzi Cambridge, which is a cheap option. Sentence8: We've got the Pizza Hut in the center of town that serves Italian food. Would you like to try that? Sentence9: The address for Carolina Bed and Breakfast is 138 Perne Road. Would you like me to book you a room? Sentence10: I need the address for Carolina Bed and Breakfast. Sentence11: No thank you. I just needed the information for now. Thanks for you help. Sentence12: I'm happy we could be of service. Thanks for using the Cambridge TownInfo centre! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User