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'd like an expensive 4 star guesthouse if that is possible. Sentence2: What day will you be staying there? Sentence3: I need a place to stay. I'm looking for a place with 4 stars and free parking. Sentence4: Acorn guest house is a good match. Would you like me to book it for you? Sentence5: Great! What is their phone number? Sentence6: There phone number is 01223694264, they are located at 49 newnham road and best thing is addmisson is free. Can I help you find anything else toay? Sentence7: I have found 19 hotels. Is there a particular area of town and hotel star rating you are looking for? Also price range? Sentence8: Yes, please. Book it as soon as possible. Sentence9: Wednesday for 3 nights and 6 people please. Sentence10: Booking was unsuccessful. kindly book another day or shorter stay. Sentence11: cambridge book and print gallery is a museum found in the Western part of the town. Their postcode is cb39ey. Sentence12: Hi, I want to find out about cambridge book and print gallery please. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User