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: Can you try in the north then? Sentence2: Yes please, I need a table for 6 on Sunday at 17:45. Sentence3: Can you try booking for 4 nights instead? Sentence4: I was not able to find any hotels matching those requirements. Sentence5: Is there any moderately priced hotels in the city centre then? I need a hotel for the same group of people for 5 nights starting the same day. Sentence6: Could you try to book us there for 4 nights instead? Sentence7: Looks like there was an error in our system earlier. There are two moderately priced hotels in the north - The Ashley and The Lovell Lodge. Sentence8: While in Cambridge I need to find a restaurant called the rice boat. Sentence9: I was able to book the Lovell Lodge for 4 nights starting Sunday for six people. The reference number is XTY5KJI9 . Sentence10: I'm happy to have helped you. Thank you for using Cambridge TownInfo centre. Have a nice day! Sentence11: Oh sure, It's for 5 nights starting sunday for 6 people please. Sentence12: The Lovell Lodge sounds nice. Please try for 5 nights but we can settle with 4 if we need to. Sentence13: I'm also looking for a moderately priced 2 star hotel with free wifi in the south. Sentence14: How many people is the hotel for and which day would you like to begin your trip on? Sentence15: Can you try the other hotel then? Sentence16: I was not able to find any hotels matching those requirements. Sentence17: Thank you very much! That was everything i needed. Take care and have a great day. Sentence18: Rice Boat is located at 37 Newnham Road in Newnham. Would you like to book a reservation? Sentence19: I was not able to book that one either. Can we try a different day perhaps? Sentence20: Wonderful. You're table is reserved for 15 minutes. The reference number is JM6MM56Y . Sentence21: Yes, which of the two would you prefer? Ashley Hotel or Lovell Lodge? Sentence22: I'm sorry there is nothing available on those days. Would you like to shorten your stay or try the other hotel? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System