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: From Leicester to Cambridge, please. Sentence2: The postcode is cb21rt and the address is Doubletree by Hilton Cambridge Granta Place Mill Lane, will that be all? Sentence3: Okay, we have a LOT of trains leaving after that time. What is your starting point and destination? Sentence4: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence5: Try riverside brasserie, it is located at Doubletree by Hilton Cambridge Granta Place Mill Lane Sentence6: Is that in the centre of town? Is it moderately priced? Sentence7: OK, the TR9776 leaves at 11:09 and arrives at 12:54, the cost is 37.80 pounds, do you want me to book you? Sentence8: Ok, you are booked. Your reference number is OYDBAUOS . The total is 37.79 GBP payable at the station . Is there anything else I can help you with? Sentence9: I just need the adress and post code. Sentence10: I am looking for a restaurant that serves Modern European food at a reasonable price. Sentence11: It is indeed in the Centre and moderately priced. Would you like me to book a table for you? Sentence12: Yes please book the train for 1 person and make sure you give me the reference number. Sentence13: I also need to take a train on wednesday, leaving after 10:15. Sentence14: I don't think so. That was everything. Thanks. Goodbye. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System