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: Yes, if I can get into a hotel in the north that would be best. Sentence2: Can you find a guesthouse for me? Sentence3: I have the Alpha-Milton guest house in the north that does not include free wifi. Would you like for me to book a reservation for you? Sentence4: Okay well enjoy your stay in Cambridge. Sentence5: I have no hotels in the north that don't include Wifi but I have found 2 that do. Sentence6: I want to find a place to stay in the north that doesn't need to have free internet. Sentence7: I am a bit confused. Did you want a guesthouse or a hotel? If you want a hotel, I can book the Ashley hotel for you. Sentence8: Book for 3 nights for 3 people starting sunday please. Sentence9: Okay I've booked you into the Ashley and your reference number is 420X4N75 . Sentence10: Yes there are many. When should I book it for and how many? Sentence11: I should have told you I am specifically looking for a hotel and not a guest house. Sentence12: Thanks, that's all I need. Have a nice day. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User