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 can't find any sushi places for you how about another? Sentence2: Thank you can I get the reference number for my reservation? Sentence3: I was able to book don pasquale pizzeria reference number is G4T03ZZ7 Sentence4: Let's try expensive Italian food. I need a table for 6 on wednesday at 18:45, can you help me? Sentence5: The booking was unsuccessful, do you have another preference? Sentence6: Yes can you find another restaurant in the same area and price range? Sentence7: No. I would like an expensive restaurant, though. Sentence8: There are no restaurants that meet that criteria. Would you like to try another area of the city? Sentence9: Okay thank you very much. Sentence10: There are quite a few. I might recommend La Mimosa, it serves Mediterranean food. Does that sound good? Sentence11: I made your reservation at Stazione Restaurant and Coffee Bar for Wednesday at 18:45 for 6 people. Have fun! Sentence12: I'm not a fan of Mediterranean, is there a Sushi spot somewhere close? Sentence13: You're welcome! Please let me know if you need anything else. Sentence14: Are there any Indonesian restaurants in the centre? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User