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'm looking for a 4 star hotel in the east. Sentence2: Ok, can you pick one for me? I'll just need the address and postcode please. Sentence3: thanks so much you've been really patient and kind. Sentence4: No, you have helped me fully. Thank you very much. Sentence5: Great, can you book a table for 4 people on Thursday at 19:45? Sentence6: Home from Home is a great 4 star guesthouse located at 78-80 milton road, cb41la. Is there anything else I can assist you with? Sentence7: I was able to book your table for 18:45. Your reference number is X15KR3V6 . Sentence8: Can you try again for me? Sentence9: The Missing Sock is near your hotel and has cheap International Food. Sentence10: Glad I could help is there anything else you need today? Sentence11: Is there any preference for wifi or parking access? Sentence12: great, that narrows it down to seven options! Sentence13: Yes, I need to find a restaurant that serves international food and is cheap. Also I need it in the same area as my hotel. Sentence14: Call us again anytime. Good Bye. Sentence15: No, is there anything available for 18:45? Sentence16: I need free parking. Sentence17: I do not have a date at this time. Sentence18: Unfortunately, our booking system is down at this time. Sentence19: I have some excellent guesthouse choices, may I check availability for a certain date? Sentence20: There is no availability at that time in the establishment. Would you like to try a different place? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System