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: Sure thing. What is your destination and when do you want to leave? Sentence2: No problem. Their number is 01223241387. Is there anything else I can help with you? Sentence3: I want to leave the restaurant by 2:00. The destination would be the camboats. Sentence4: no not at the moment. But i do need their phone number though. Sentence5: IS there a high end restaurant that serves british cuisine in the same area? Sentence6: You're all set. A blue audi is picking you up and their contact number is 07384256413. Sentence7: you are lucky! there is only one restaurant called grafton hotel restaurant that serves expensive british in the east. Do you need my help to reserve it? Sentence8: Can you also book me a taxi to commute between the two places? Sentence9: There is camboats in the east. Their phone number is 01223902112 and they are located at the plough, green end, fen ditton, post code cb58sx. Anything else? Sentence10: I'm looking for a type of boat in the east. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System