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: I have 19 places to stay with 4 stars and parking, which area would you prefer? Sentence2: OK, I don't need a room right now, but can I have the post code and phone number for Acorn? Sentence3: I need to find a 4 star hotel that also has free parking. Sentence4: Are there any guesthouses with free wifi? Sentence5: It is moderately priced. I don't have an exact price. Sentence6: I would like to be in the north area. Sentence7: How much per night? Sentence8: Thanks! That's all I needed today. Bye! Sentence9: Yes, all 7 guesthouses have internet available. What price range are you looking for? Sentence10: How about Acorn Guest House? Sentence11: There are no hotels that fit your criteria. However, there are 7 guesthouses available. Would you like me to book one of those for you? Sentence12: Sure. Postcode cb41da and phone number 01223353888. Is there anything else I can do for you? Sentence13: Thank you, have a great day. Sentence14: Oh, cool. It really doesn't matter. Which would you recommend? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User