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: The booking was successful. The reference number is : 37DDZB4H . Sentence2: Can you find me a train from Leicester to Cambridge on Saturday> Sentence3: I do need the price and arrival time first. Sentence4: I'm open. What would you recommend? Sentence5: I'm on the North side, please find me an expensive restaurant here Sentence6: I'd recommend The Hotspot. It's a Chinese restaurant. Would you like to book a table? Sentence7: It arrives at 18:54 and is 30.24 pounds. Sentence8: Great, have a terrific trip! Sentence9: The TR7824 bus leaves at 17:09. Would you like to book this one? Sentence10: Thank you, that is all I need, you helped me a lot. Sentence11: Would you prefer Chinese, French, or European cuisine? Sentence12: What time would you like to arrive by? Sentence13: Yes please, book me for 4 people at 13:15 on friday. Sentence14: I just need to leave sometime after 16:30. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System