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: Goodbye. Have a great day! Sentence2: Yes, there are 15 places that are moderately priced guesthouses. Is there a certain area of town that you prefer? Sentence3: Of course! I have 8 options: 7 of which have 4 stars and 1 has 3 stars. Would you like more information? Sentence4: I apologize but we don't have anything that fits your criteria. Would you like to change the area or try a hotel? Sentence5: I'd prefer something in the center of town that has free wifi. Sentence6: The stars don't matter. Please book one for 3 people for 5 nights, starting Sunday. Sentence7: That booking was unsuccessful. Will any other length of stay or starting day be possible? Sentence8: Thank you for all your help. Good bye. Sentence9: Oh, that's a bummer. Ok, how about trying in the north? Sentence10: Let's try to start on Monday. Sentence11: I'm sorry, but there's nothing available starting on Monday. Sentence12: I actually would like it to be on Sunday for 2 nights. Sentence13: I have reserved 2 nights for 3 people starting on Sunday at the Acorn Guest house which is in the north of the city, is moderately priced and has internet. Reference K0RIYU4Z . Sentence14: Could you help me find a moderately priced guesthouse? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System