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 there is anything else you might need please feel free to call back. Enjoy your day! Sentence2: Da vinci pizzeria is the only cheap Italian restaurant in the north, located at 20 Milton Road Chesterton. Would you like to reserve a table? Sentence3: The address is 20 Milton Road Chesterton. The postcode is cb41jy and the phone number is 01223351707. Is there anything else I can help you with? Sentence4: Sure thing where will you be departing from? Sentence5: Train TR9460 leaves Cambridge at 15:36 and would get you to Norwich by 16:55. Would you like me to book for you? Sentence6: I'm looking for something in the north, please! Sentence7: No thanks. Maths isn't my biggest strength so please tell me what the total travel time is. Sentence8: I would like to go to Norwich. Sentence9: I am looking for Italian restaurants in Cambridge in the cheap price range. Sentence10: I'll be happy to help with that. Where would you like to depart from and where would you like to go? Sentence11: Yes, please. I also need a train on Monday, arriving at 17:45. Sentence12: No thanks, I just need the phone number, address, and postcode. Sentence13: We have a few in the north, west, and centre. Do you have a preferred location? Sentence14: I think that is all the info on the train that I needed. Sentence15: I will be leaving cambridge heading to norwich Sentence16: The total travel time is 79 minutes. Can I do anything else for you today? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System