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: Great, what are they? Sentence2: I recommend Charlie Chan located on Regent Street, City Centre, in the town centre. Sentence3: Can you book a table for me? Sentence4: I'm looking for places to go in town. The attraction should be in the centre. Sentence5: I want to find a Chinese restaurant in the cheap price range. Sentence6: Sure, the address is anglia ruskin enterprise, east road post code cb11pt. Would you like a reservation? Sentence7: How does the Mumford Theatre sound to you? Sentence8: sure, i have four options for you Sentence9: You are welcome. Goodbye. Sentence10: Its sounds great, what is the address and post code please? Sentence11: how many people and what time? Sentence12: sure, phone is 01223361763 address is regent st city centre and its in the centre of town, anything else? Sentence13: You have the Charlie Chan, the Rice House, the Lucky Star, and the Golden House. Would you like to make a booking for any of these? Sentence14: You decide. I need the area their located in Sentence15: No, i don't need anything else! Thanks and have a good day! Sentence16: Actually, I won't need a booking. I'll just need the phone number, address and area, please? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System