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, I think that is all for today. You have been great. Thank you for your help. Sentence2: Do you have a cuisine or price range preference? Sentence3: can I have the address, phone number, and entrance fee please ? Sentence4: Sorry, there is no match, do you have any other location preference? Sentence5: What about christ's college? It has free admission. Sentence6: Are there any colleges in the west. Sentence7: How about trying Italian food? Sentence8: Yeah, could I book a table for 3 on Saturday at 11:45? Sentence9: It's located at saint andrew's street, 01223334900 is their phone number and the entrance is free as I said. Sentence10: I want to eat some traditional food, I'm on a budget so it needs to be cheap! Sentence11: La Margherita meets your criteria. Would you like to book a table? Sentence12: I am also interested in a restaurant in the same area Sentence13: Thank you for your help! Sentence14: Can I help you with anything else today? Sentence15: Thank you for using our service today! Sentence16: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 9C381LJE . Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User