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: That should be all! Thank you for your help! Sentence2: I don't care, a hotel or guesthouse. Pick a good four star, with wifi and parking. I need to book for Thursday. Sentence3: Would you like a guesthouse or a hotel? Sentence4: Alright, I have many options available for you to chose from. Do you have a price range you're looking for, or an area of town you'd like to stay in? Sentence5: I have several choices. The acorn guest House has 4 stars, wifi and is moderately priced. How many nights and how many people will be staying? Sentence6: No, I don't have a price range or area of town. Sentence7: Great. I have 7 people and need it for 5 nights starting Thursday. Sentence8: You are welcome, enjoy your stay. Sentence9: There are 21 places that meet your needs. Would you like to narrow it down based on anything else, such as free parking or whether it's a hotel or guesthouse? Sentence10: Wonderful. I have booked Acorn Guest house to meet your needs. The reference number is TDUTD8DV . Is there anything else I can help you with? Sentence11: Yes, I would like free parking. I don't care whether it's a guesthouse or hotel, though. Could you suggest a place? Sentence12: Bonjour, I need a 4 star hotel with free internet, please. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User