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 want to eat at an expensive European restaurant. Sentence2: I have not booked it as of yet. Would you like me to book it for you? Sentence3: No thanks. I just need the phone number please. Sentence4: Did you book a table for me? Sentence5: May I have the phone number please? Sentence6: The phone number for Churchill College is 01223336233. Can I help you with anything else today? Sentence7: Yes, I would like it in the West as well. Sentence8: Sure, would you like that in the west part of the city also? Sentence9: can i get the phone number to churchill college Sentence10: Sure! Their phone number is 01223355166. Can I help you with anything else? Sentence11: Can you give me some information about the free options? Sentence12: you are welcome. enjoy your stay. Sentence13: Great I found the cambridge lodge restaurant for you! What would you like to do with it? Sentence14: I would like to find something to do in the west. Sentence15: Sure. The phone number to the Cambridge Lodge Restaurant is 01223355166. Sentence16: We have some lovely college's in the area some are free some aren't Sentence17: Thank you, that will be all. Sentence18: churchill college, clare hall, and magdalene collegeare free. All are in the west area and is very nice. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User