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 I was able to get you into the Zizzi Cambridge and your reference number is GI0FZMKL . Sentence2: Sure, there are 9 restaurants to choose from. Did you have a price range in mind? Sentence3: Okay thank you very much for your help. Sentence4: Can you find me an italian restaurant in the centre? Sentence5: Yes please, same price range as before. Sentence6: You are welcome. Enjoy your lunch. Sentence7: Yes, please book ask for 4 people at 12:15 on monday. Sentence8: Okay. Don't hesitate to call us if you need anything else. Sentence9: I'm looking for something on the cheap side, please, although I'd like to get good value for the money. Sentence10: Thank you. I will. Sentence11: There are three Italian restaurants in the center in the cheap range. They are pizza hut city centre, ask, and zizzi Cambridge. Which do you prefer? Sentence12: I would recommend ask as it is a nice place. Sentence13: Any of them will be fine. As long as it's cheap. I need a table for 4 on monday at 12:15 please. Sentence14: I'm sorry but I couldn't book you there. How about another restaurant? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System