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 do need one with free parking, and it needs to be in the cheap price range, but those are my only requirements. Which one is your favorite? Sentence2: Nope, that's it for now. Thanks very much for your help! Sentence3: Okay, my favorite is Autumn house in the east. Would you like me to book a reservation? Sentence4: You're welcome. Have a good day! Sentence5: it is a chinese restaurant located in the city centre. It has an expensive price range. Can I help you with anything else? Sentence6: Yes, please book a table at Tang Chinese for 2 people at 17:30 on Tuesday. Sentence7: The post code is cb58rs and they do offer free wifi. Sentence8: Your booking was successful. Your reference number is O8SO1FUO . Is there anything else I can help you with? Sentence9: Can you help me find a cheap guesthouse that I can stay at? Sentence10: Excellent! I've also heard great things about the Tang Chinese restaurant. What can you tell me about them? Sentence11: Sure, I have 24 options for you! Sentence12: I would just like to know what the postcode is and whether or not they offer internet. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User