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: Can you book for seven people for three nights starting from Friday? Sentence2: I will be leaving on Friday sometime after 16:15. Sentence3: Archway House is a moderately priced guesthouse in the north with a 4-star rating. They offer free Internet and parking. Would you like to make a reservation? Sentence4: I'm also looking for a train to get to cambridge. I'll be departing from leicester. Sentence5: Sure, I'd be happy to help with your request. To help narrow down the results, what area and price range are you looking for? Sentence6: i can help you with that! what day are you traveling? Sentence7: Booking was successful. Reference number is : A16QWFWX . is that fine with you? Sentence8: yes and thank you that will be all Sentence9: Your reservations have been made. Your reference number is A16QWFWX . Is there anything else I can assist you with? Sentence10: Can you help me find a 4 star rated place to stay please? Sentence11: Have a great day! Sentence12: Moderate price range. Something with 4 stars. Area doesn't really matter to me. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User