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: The huntingdon marriott hotel is a 4 star hotel with Internet in the west. Would you like me to make a booking? Sentence2: No, I'd like to keep looking for an expensive hotel. Sentence3: Thank you very much. I appreciate your help. Sentence4: North part of town,please. Sentence5: No problem. Will that be all for today? Sentence6: Yes it is an expensive, I have listings for another place that is cheap if that is what you need. Sentence7: Yes, that will be all for today, goodbye. Sentence8: I was able to successfully book you at the university arms hotel, the reference number is 1F6HEPGZ . Sentence9: I was unable to book the hotel for that day. Would you like to try the cheap hotel? Sentence10: Is there a certain area you would like it to be in? Sentence11: Can you find a room available at a 4 star hotel with free wi-fi? Sentence12: I would prefer the expensive hotel. Please book it for 2 people for 2 nights starting on Sunday. Sentence13: Is the place expensive? Sentence14: Thank you for using our system! Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System