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: Not that is it thanks. Sentence2: Yes, please. Do either have free wifi? Sentence3: Wonderful. Your room has been booked for 3 nights. Your reference number is HH78SJFP . Is there anything else I can help with? Sentence4: Thank you if you need any more help please let us know. Sentence5: Both of the guesthouses have free wifi and free parking. I would recommend the Aylesbray Lodge Guest House due to it being 4 stars. Sentence6: Great! Can you book that for me? Sentence7: I can help. We have 18 moderately priced hotels. Do you have any additional preferences? Sentence8: I'm looking for a moderately-priced place to stay. Sentence9: Yes, tell me what day are you arriving, how long is your stay, and for how many people? Sentence10: I have 2 Guesthouses available for what you need. Do you want information on one of them? Sentence11: I prefer the south part of town if you have anything. Sentence12: There wilI be 4 of us arriving on Saturday, and staying for 3 nights. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System