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: No that's it, thank you! Sentence2: How about some chinese food? Sentence3: Can i also book a train to Cambridge? Sentence4: What are you preferred arrival and departure times? Sentence5: There are three restaurants, Charlie Chan, Rice House, and Golden House. Would you like to book a table at one of them? Sentence6: You know, I'd really like to try north african food. Sentence7: You're welcome, I'm glad to help. Goodbye! Sentence8: There are a number of trains that can get you to cambridge. Where are you leaving from? Sentence9: The train should depart on Monday from Kings Lynn for two people. Please give me my reference number too. Thanks! Sentence10: I'll be leaving from kings lynn on Monday. Sentence11: Absolutely! I have about 15 restaurants that are in that area and price range. Can you tell me what type of food you might be trying? Sentence12: Hi there, I'd like to find a good place to eat in the city centre tonight, but I'm looking for somewhere cheap. Have you any good recommendations? Sentence13: Fantastic! Your table is booked for Rice House at 19:00 on Monday, and the reference number is T0NP4V1O . Is there anything else you need help with? Sentence14: Your train has been booked for 2, leaving at 5:11. Reference number VZNMSR6M . Is there anything else I can help you with? Sentence15: I am sorry, but there are no cheap restaurants in the centre serving north african food. Would you like to keep searching for another type? Sentence16: How about Rice House? I'd like to book a table for two at 19:00 on Monday. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User