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: Nothing else today, thanks. Sentence2: The cambridge book and print gallery is in the west side of town. What else can I help you with? Sentence3: I have 3 listings that fit that criteria. Would you need parking as well? Sentence4: Which section of the town could you like the hotel to be in? Sentence5: Yes, the Warkworth house's postcode is cb11ee. Sentence6: In the east please. Sentence7: I have 4-star guesthouses in the east. Warkworth House is a great place to stay. Sentence8: Okay, thanks. I'm also looking for information on cambridge book and print gallery. What area is it in? Sentence9: Parking isn't necessary, but I would like a 4-star hotel if possible. Sentence10: You're welcome. Have a nice day. Sentence11: I'd like to find a moderately priced hotel with free wifi. Sentence12: Can you give me the postcode for that hotel? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System