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: Hello! I'm looking for a train arriving by 10:30 to cambridge. Sentence2: Can you tell me what the travel time is and the price? Sentence3: That's train TR6180. The travel time is 105 minutes, and the cost is 37.80 pounds per ticket. Sentence4: Great. I'm glad I could help you with that. Have a nice day. Goodbye! Sentence5: I am departing from leicaster and it will be on thursday Sentence6: Which train would you like that for? Sentence7: 9:54 sounds good. What is the price? And how long is the trip? Sentence8: Four trains will get you there by 10:30. Would you prefer to depart at 6:54, 7:54, 8:54 or 9:54? Sentence9: The 8:09 departure, please. Sentence10: That are several options that arrive in Cambridge by 10:30. When are you traveling and where are you departing from? Sentence11: Thank you. That's all I needed today. Sentence12: I beg your pardon, but the times I mentioned earlier were for arrival rather than departure. The departure times are 5:09. 6:09. 7:09, and 8:09. What is your preference? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System