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: Yes. I'd also like to go to a museum in the same area. Sentence2: The phone number for byard art is 01223464646. Is that all you needed help with? Sentence3: For the museum the admission is free of charge, so you do not have to have a ticket. Is there anything else I can help with? Sentence4: Great, enjoy the trip! Sentence5: Yes, can I purchase the tickets now or do I need to buy them at the door? Sentence6: Byard Art is in the south. They're at 14 King's Parade. Would that suit you? Sentence7: I can recommend Nandos, a cheap portuguese place in the south. I can help you book a table if you'd like. Sentence8: Yeah, that should be all, thank you. Sentence9: Great I was able to get that booked for you. Reservation # is ID2VGNB7 . Is there anything else? Sentence10: Yes please. A table for 2 at 15:30 on Thursday would be great. Sentence11: Can I please get a phone number? Sentence12: Hi, I'm looking for a Portuguese restaurant in the south of Cambridge. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System