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 also need a train from stansted airport and go to cambridge. Sentence2: Can you help me find information on a hotel called allenbell? Sentence3: That is all I need. Good bye. Sentence4: I need a room there for 8 on saturday, and staying two nights, I'll need the reference number too please Sentence5: Thank you for using our service! Sentence6: Booking was successful, the total fee is 80.8 GBP payable at the station . Reference number is : 2D2L9TYI . Sentence7: Train TR5921 departs from stansted airport at 18:24 and arrives at cambridge at 19:30 on friday. Is there anything else I can help you with? Sentence8: 18:15 is the departure. 19:30 is the arrival. Sentence9: All trains leave on friday, what time is the depature and arrival? Sentence10: That will work. Please book 8 tickets. I'll also need a reference number. Sentence11: I've scheduled your booking at the Allenbell on Saturday for 2 nights for 8 people. The Reference number is : WBD98WJA . Sentence12: The Allenbell Hotel is a 4 star guesthouse hotel, the price range is cheap. Internet and parking are available. Would you like to book a room? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User