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 to find hotels in the cheap price range that offer free wifi. Sentence2: There is one hotel that matches your search. It is the cambridge belfry in the west area. Can I book that for you? Sentence3: There are 2 choices - would you prefer indian or Italian food? Sentence4: No thank you, just the address and phone number please. Sentence5: Thanks. I am also looking for a place to eat in the north. Same price range as my hotel. Sentence6: da vinci pizzeria serves italian food it is in the north of town Sentence7: I would prefer italian. Sentence8: OK, I will need to make a reservation for the same group of people at 12:45 on that same day. Sentence9: It was my pleasure, enjoy the rest of your day. Sentence10: Can you book it for me. 3 people, 4 nights, Sunday. Reference number, please. Sentence11: Great. Thank you for your help. Sentence12: You're all set. Your Reference number is : 7J5INWLY . Can I assist you with anything else? Sentence13: They are located on back lane, cambourne. Is there anything else I can help you with? Sentence14: Booking was successful.Reference number is : 1CU5LU5X . is there anything else i can help? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User