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'll take any type of cuisine, then. I just need a reservation for 6 at 13:15 on Saturday. Sentence2: Unfortunately, I was not able to locate a Mexican restaurant in the south part of time. Would you like me to search for a different cuisine? Sentence3: Mexican, please. Sentence4: Okay I guess. Try booking there please. Sentence5: I am sorry. There is no japanese restaurant in the south area? Would you like to try another area or food type? Sentence6: Great! I was able to book you there and your reference number is W2A8GHG8 . Sentence7: Thank you for your help. Have a great day. Sentence8: I am looking for Japanese food in the south part of town. Sentence9: Yes please. Are you sure there are no Japanese or Mexican places in the same price range open on the south side that day? Sentence10: The Mexican place is not open then, shall I try another place to dine? Sentence11: Thank you for using the Cambridge TownInfo centre. Have a wonderful day! Sentence12: No I am sorry. But there is a Portuguese restaurant if you are interested. Sentence13: Try Mexican, then. Sentence14: There are Japanese, Italian, Modern European, Portuguese, Indian, and Mexican. Which of these do you prefer? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System