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: Can I get information on the area you would like the guesthouse in? Sentence2: Thank you, so much. That is everything I need. Sentence3: Only if it has free parking. Sentence4: I need to find a place to stay in the moderate price range with free parking. Sentence5: Yes it does and I was able to book it for you! The reference number is LCO449VR . Sentence6: I am looking for a guesthouse type please. Sentence7: I don't have a preference. Sentence8: Yes please, and let try the North part of town. Sentence9: What day would you like it booked for? Sentence10: I have 5 guesthouses available in the north with free parking. What star rating are you looking for? Sentence11: If the Acorn Guest House has free wifi, please book it for me. Sentence12: I have 14 places that match your request. Is there a certain area or type of lodging that you would like? Sentence13: yes, lets try a different hotel in the same price range. Sentence14: Starting Sunday for 3 nights and 6 people. Sentence15: Thank you for calling. Have a great day! Sentence16: I'd recommend the Acorn Guest House. Would you like to book a room? Sentence17: I am sorry but I was unable to book that for you. Should I try another hotel? Sentence18: I could try the home from home for you. Would that work for you? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User