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'm looking for a restaurant, not a hotel. Can you try again? Sentence2: You're welcome, enjoy your meal. Sentence3: Hi, I'm looking for a restaurant in the moderate price range that sells north indian food. Sentence4: That is all! Thank you! Sentence5: Unfortunately there is not hotel with those characteristics. perhaps you could try other types of cuisine? Sentence6: The Pizza Hut in Cambridge Retail Park Newmarket Road Fen Ditton seems to meet your requirements. Sentence7: My apologies. I meant to say restaurant not hotel. Unfortunately, there aren't any restaurants that are that price range that serve north indian food. Sentence8: The number there is 01223323737 and the postcode is cb58wr. Anything else? Sentence9: We have 5 locations that match your criteria. What area of town would you like it in? Sentence10: Sounds good, can I get the phone number and postcode, please? Sentence11: Okay. How about one that serves italian food? Sentence12: I would like it to be in the east area of town please. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User