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: You can reach them at the number 01223210353. Anything else I can do for you? Sentence2: Great! Booking was successful. The table will be reserved for 15 minutes. Reference number is : W9RRJVPX . Is there anything else you need? Sentence3: Doesn't matter so much, as long as it has 4 stars & is cheap. I would also like parking and wifi. Sentence4: Okay! I have found 3. One is in the East part of town, and one is in the Centre. What part of town would you like to dine in? Sentence5: What is the price range of the one in the east? Sentence6: You're welcome! Enjoy your stay in Cambridge! Sentence7: no all i need is the phone number Sentence8: That's all I need for now. Thanks! Sentence9: I need to find a room too. Sentence10: i want to find an international restaurant Sentence11: Yes, I'd like a table for 5 at 16:45 on Friday please. Sentence12: The price range for the east restaurant is cheap. Would you like to book a table? Sentence13: The allenbell hotel is available in the east part of town. would you like me to book it for you? Sentence14: What area would you like me to look for hotels at? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User