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'm sorry, there are no available seats at that time. Would you like to try Efes restaurant? Sentence2: Sure, a turkish restaurant in the moderate price range would be great. Sentence3: Are there any caribbean restaurants in any other part of town? Sentence4: Yes, book me The Anatolia for 8 people at 12:00 on Friday. Sentence5: Great! Thank you so much for your help. That will be all. Sentence6: I have 2 turkish restaurants in the centre. The anatolia or efes restaurant are both moderate. Would you like me to book one for you? Sentence7: I am sorry there are none in any area of town,is there another type of food you would be interested in? Sentence8: I am looking for a caribbean restaurant in the centre of the city. Sentence9: Okay. Great. Enjoy your lunch. Sentence10: Regretfully, there are no caribbean restaurants in the centre. Would you like to try something else? Sentence11: Yes please try booking that. Sentence12: Yes I was able to get you into that restaurant and your reference number is 46AL3F0C . Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User