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, thanks! That is all I needed for today. Sentence2: Ok, that sounds good, lets book a room please. Sentence3: Certainly, the good luck chinese food takeaway is in the south part of town. Can I book at table for you, if so how many will be dining. Sentence4: It has been my pleasure. We hope you enjoy your time here in Cambridge and feel free to contact us if you need any further assistance. Sentence5: Thank you! I am also searching for The Good Luck Chinese Food Takeaway. Sentence6: Sure thing! I just need to know what day you'll be arriving, how many nights you'll be staying, and how many people are in your party to be able to book. Sentence7: First, I need the price, phone number, and postcode there. Sentence8: I want to book a table for 2 people at 12:30 on sunday. Sentence9: Yes, the acorn guest house is a 4-star place Sentence10: The restaurant has been booked for two people Sunday at 12:30. Your reference code is COB6X9IP . Sentence11: The acorn guest house will meet your needs. Would you like to book a room there? Sentence12: Is that a 4-star hotel? I do prefer a 4-star place. Sentence13: The acorn guest house is located at 154 chesterton road postcode cb41da, phone 01223353888. The price is in the moderate range. Shall I book a room for you? Sentence14: I want to find a place to stay with free wifi. It doesn't have to have free parking though. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System