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 am having difficulty booking either of the. Can you find another day or time that would suit you? Sentence2: Absolutely. Can I suggest the Warkworth House at a moderate price range, or the Autumn House at a cheap price range. Do either of these interest you? Sentence3: OK, you're all booked for 3 nights at the Warkworth House, starting Thursday. Your reference number is AC1NVW47 . Can I help with anything else today? Sentence4: I would consider both. I need to book for three people and 5 nights starting on Thursday. Can either of them offer that? Sentence5: There are 6 possible places that fit your request. Would you like more information or to add additional search preferences? Sentence6: Good Afternoon, I am looking for a place to stay on the east side in a guest house Sentence7: Can you see if any of them offer free parking? Sentence8: You're welcome. Goodbye! Sentence9: I really need to stay during that time frame. Would you mind checking again? Sentence10: No, that will be all. Thanks! Sentence11: Honestly, any price range will do. Can you suggest one for me and help me with booking a room? Sentence12: 5 of the guesthouses offer parking. What is your price range preference? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System