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'd like a recommendation that is able to book a table for 5 people at 14:45 on Friday. Sentence2: Alright, I booked you a table for 5 on Friday at 14:45 at the Kohinoor. Your reference number is 20OK4WP8 . Can I help you with anything else? Sentence3: I'll need to book a taxi from the Cambridge Museum of Technology to the Kohinoor, arriving by 14:45. Sentence4: I'm looking for a place to dine that's in the cheap price range and that serves Indian food. Sentence5: The phone number is 01223368650 and the post code is cb58ld. Can I help you with anything else? Sentence6: Would you like a recommendation, or do you want to specify an area? Sentence7: That sounds great! Can you give me their postcode and phone number? Sentence8: No, you have been very helpful. Thanks so much and have a nice day. Bye. Sentence9: How about the Cambridge Museum of Technology at The Old Pumping Station on Cheddars Lane? Sentence10: I've booked your taxi. It will be a grey skoda and the contact no. is 07998309857. Is there anything else that I can help you with? Sentence11: Thanks, I'd also like to find an attraction in the east, please. Sentence12: Thank you for choosing Help Desk. Good bye. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User