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: Address please and thats all. Sentence2: I found 7 hotels that are in the cheap, moderate, and expensive range. What would you prefer? Sentence3: It doesn't matter. Let's go with moderate. Sentence4: They are located at 138 perne road. Sentence5: I am looking for a 4 star guesthouse? Do you have any on the east side with free wifi? Sentence6: Are you looking for a hotel or a guesthouse? Sentence7: Thank you. That's all I need. Sentence8: Okay great. Enjoy your stay in Cambridge. Sentence9: There are 3 entries that meet your requirements. Sentence10: You are booked into the carolina bed and breakfast. Your reference number is WXN8W3MZ . May I help you with anything else? Sentence11: Hi, I'm looking for a place to stay in the east with free wifi. Sentence12: Perfect! Can you make a reservation for me for 3 people, 5 nights starting Tuesday? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User