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: Thank you that will be all I need. Sentence2: I'm looking for a moderately priced place to stay in the south. Sentence3: I need to be there by 16:15. Sentence4: Ok I have booked that and the Reference number is 1N67NESA . Is there anything else I can help with? Sentence5: leicester is where i am going Sentence6: would you be leaving from cambridge? Sentence7: Thank you for using the Cambridge TownInfo Centre. Goodbye! Sentence8: Yes leaving from Cambridge, on Friday please. Sentence9: Would you like me to go ahead and book that? Sentence10: Thank you, I'll accept the recommendation at Aylesbray Lodge. Sentence11: I also need a train. Sentence12: Okay I have 19 trains. Could you give me a time by which you'd like to leave or arrive? Sentence13: Yes please. I would like to book it for 2 people for 3 nights starting from Wednesday. Sentence14: Okay, I have TR4170 that leaves at 9:09 and arrives at 10:54. It cost 37.80 pounds. Would you like this train booked? Sentence15: I have 2 options for you, both guesthouses. I recommend the Aylesbray Lodge, at 5 Mowbray Road. Sentence16: There are over two thousand trains. Where is your destination? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User