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: Your booking is all set. The reference number is MNOLS7EN . Can I help with anything else? Sentence2: yes i will take the first choice can you book it for 4 people for 2 nights starting wednesday and i need a reference number Sentence3: Have a wonderful day! Sentence4: That narrows it down to three: the Allenbell, Autumn House, and Leverton House. Do any of these sound good to you? Sentence5: That's all. Thanks for the help! Sentence6: That sounds great! Can I get a table for 4 at 13:15 Wednesday? Sentence7: We have The Missing Sock, they serve international cuisine. Would you like me to reserve a table for you? Sentence8: Your booking is all set! The reference number is 7TT8FO52 . Is there anything else you need? Sentence9: I would prefer to stay on the East side, with free parking available. Sentence10: Hi, I'll be visiting soon and can't wait to try local restaurants. I need a cheap place to stay and would like to try a guesthouse. Any recommendations? Sentence11: Yes, I am also looking for a restaurant in the same area as the hotel within the same price range as the hotel. Sentence12: Great! There are 9 guesthouses in Cambridge that are cheap. Is there a certain area you prefer? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System