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: Thank you for the help, that's all I need. Sentence2: Unfortunately there are none on the north side of town that fit your criteria. Would you like me to look in another part of the city? Sentence3: I have Ashley Hotel or Lovell Lodge on the North side of town. They both have free wifi and parking. Can I book one of those for you? Sentence4: No thank you. Sentence5: Do either of those have 4 star ratings? Sentence6: You're welcome. Have a nice stay! Sentence7: Kirkwood house is a moderately priced hotel and its address is 172 chesterton road, cb41da. Sentence8: What is Kirkwood House's address, postcode, and price range? Sentence9: I have 5 hotels that meet your needs 2 are moderately priced and 3 are expensive. Do you have a preference? Sentence10: Is there any with a 4 star rating and includes free wifi? Sentence11: No, I'm sorry. There are several guesthouses with 4 stars. Kirkwood House is in the north and has fee parking and WiFi. Can I reserve a room? Sentence12: A hotel in the north with free parking, please. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User