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: Do you know if they offer internet and free parking? Sentence2: No, that's ok. I have everything I need for now. Thank you for all of your help today. Sentence3: It is a moderately priced guesthouse in the north. Sentence4: Tandoori Palace is in the west, address 68 Histon Road Chesterton, postcode cb43le. Sentence5: Great, could you reserve me a table for 1 on Sunday at 18:15 please? Sentence6: I've done it. The reference number is LPNKZ7V5 . Anything else I can do for you? Sentence7: Can you tell me where the restaurant Tandoori Palace is located? Sentence8: The postcode is cb41da. Would you like me to make a reservation? Sentence9: Sure, what day would you like to stay? Anything else you'd like to tell me? Sentence10: Yes, I would like to make a reservation. Sentence11: Yes the hamilton lodge offers both free parking and internet. Would you like to make a reservation? Sentence12: You're welcome! Thanks for contacting me today! Sentence13: No, what is the postcode, please? Sentence14: I'm also looking for Hamilton Lodge. Do you have any information on it? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System