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: No, the price range is flexible. I would like to book a room on Wednesday for 2 people, 2 nights. Sentence2: That will do. And that is for 2 people for 2 nights starting Wednesday. Sentence3: The reference number please! Sentence4: Booking was successful. Can I get you anything else? Sentence5: Have a good day! Sentence6: No, but I do need free wifi as well as free parking. Sentence7: Sorry, there isn't any vacancy for those days. Would you care to stay just the Wednesday? Sentence8: I have lots of guesthouses available with parking, do you have a preference for area? Sentence9: Do you have a preference for price range? Sentence10: Your reference number is LPMF11YC . Sentence11: Thanks for your help. I'm all set. Bye. Sentence12: Sure, let's try for just one night and see if that works please. Sentence13: Can I book you in at the allenbell? It is cheap and in the east. Sentence14: I am looking for a place to stay that is a guesthouse with free parking please. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System