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: Okay thank you so much! Sentence2: There is one place, City Centre North B and B. It is a guest house that has internet and parking available, is cheap, and is at 328a Histon Road. Sentence3: Yes, I need a restaurant that serves sri lankan food in the same area. Sentence4: That's OK, can you look for an Italian food restaurant. Sentence5: There's da vinci pizzeria in the north located at 20 Milton Road Chesterton. Would you like me to book a reservation for you? Sentence6: What is the phone number and post code for that B and B? Sentence7: There are no sri lankan restaurants in that area. Is there another type of food place you'd like to try? Sentence8: The phone number is 01223312843 and the postcode is cb43ht. Do you need anything else? Sentence9: Thanks, please let me know if you need anything else. Sentence10: No, thank you! Sentence11: Can I help you with anything else? Sentence12: You are very welcome. Have a great day! Sentence13: I am looking for a place to stay in the north with a 0 star rating. Sentence14: No that will be all thank you Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System