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've booked a taxi for you, it's a grey volkswagen and the contact number is 07148390604. Sentence2: Sure. Christ's college is a nice, free attraction. Would you like the phone number? Sentence3: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence4: Their address is Regent Street. What else can I help you with? Sentence5: Not now, I just need the address and also to know whether there is free parking. Sentence6: There is a parking for the hotel, we will be happy to take your reservation at your earliest convenience. Sentence7: Great, that's all I needed. Sentence8: Yes the University Arms hotel is located in the Centre. Would you like me to book it for you? Sentence9: Thats great thanks. I am also looking for a college in the centre to visit- can you make a recommendation? Sentence10: Could you please give me the address of the hotel? Sentence11: Yes, could you book a taxi for me between the hotel and the college? I want to leave the college by 3:30 Sentence12: I am looking for the university arms hotel please. Sentence13: Yes, as long as it is in the Centre. Could I also get the postcode? Sentence14: The post code is cb23bu and contact number is 01223334900. Anything else I can assist with? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User