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: Hi, I am looking for information on a train. Sentence2: I have two guesthouses. Would you like a cheap one that is a 4 star, or a moderately priced 3 star? Sentence3: I need to book seats for 4 people please, and can I get the reference number for that? Sentence4: Yes, that sounds perfect. I'll need 4 seats. Sentence5: I need a hotel in the west with free parking please. Sentence6: I actually need a guesthouse instead of a hotel, please. Sentence7: Do you care about the price range? I have one cheap and one expensive hotel that fits your current criteria. Sentence8: Great! I found 9 trains that match your requests. I'll be happy to book one if you'll let me know how many tickets you need. Sentence9: Your booking was successful, the total fee is 66 GBP payable at the station . Your reference number is : P6G0S9IT . Is there anything else I can help you with? Sentence10: I'd like to arrive by 10:30 on Thursday, please. Sentence11: First let's verify which train you want. The TR1719 will have you at your destination around 10:09. Sentence12: What time would you like to leave or arrive by? Sentence13: I'd like to go to Cambridge and will be departing from Peterborough. Sentence14: You came to the right place! Where would you like to go? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User