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: If at all possible, I would like to leave after 16:45. Sentence2: Thank you for your help. That will be all. Sentence3: I need information on trains leaving on Friday. Sentence4: No thank you. I need info on cafe jello gallery. Sentence5: The price for the train is 4.40 pounds. Can I book this for you? Sentence6: Ok, there are many trains that day. Do you know your destination? Sentence7: What is the price? Sentence8: I'm going from Ely to Cambridge. Sentence9: What time would you like to leave by? Sentence10: They are a museum in the west. They offer free entrance. They are located at 13 Magdalene Street. Their postcode is cb30af. Their phone number is 01223312112. Sentence11: I have train TR2759 leaving at 17:35 and arriving by 17:52. Would you like to make reservations? Sentence12: Thank you for using the Cambridge Town Info service! Enjoy your time in Cambridge Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System