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: The booking with successful your reference number is UHTGVMDM . Can I help you with anything else today? Sentence2: Great, that will do it, I appreciate your help today. Thank you. Sentence3: I will need thursday at 17:00 please. Sentence4: 4 nights, please. Reference number, please. Sentence5: Nandos is a Portuguese restaurant at Cambridge Leisure Park Clifton Way cb17dy. Their phone number is 01223327908. Sentence6: yeah i want to book that hotel too. for the same group of people. Sentence7: for how many days? Sentence8: Sounds good can I make a booking for 7 people at 14:00 on saturday? Sentence9: You are welcome! I hope you enjoy your stay! Sentence10: Beautiful, just need some info on the express by holiday inn cambridge. Sentence11: Yes that hotel is in the expensive range on the east side and offers free wifi and parking. Anything else? Sentence12: I'm looking for a portuguese restaurant in the south side. Sentence13: For what day and time do you need? Sentence14: Yes great! Your booking was successful and the reference number for your booking is AKFP9F2B . Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User