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 book that for you. Can you give me a departure time? Sentence2: Sure. Their number is 01223519224. May I help you with anything else? Sentence3: I just need their postcode and price range please. I will book it myself later. Sentence4: Thank you, goodbye. Sentence5: Yes, I am also looking to visit The Fez Club during my stay. May I have their phone number? Sentence6: Yes we do have one Express Holiday Inn. Would you like me to book you a room there? Sentence7: No problem! The postcode is cb13llh and price range is listed as expensive. Is there anything else I can help you with today? Sentence8: I need a taxi to take me from The Fez Club to my hotel please. Sentence9: I booked a red Volkswagen to pick you up at The Fez Club by 17:00. The contact number is 07404417573. Is there anything else I can assist you with? Sentence10: Yes please, two people and one room with two beds for next Saturday. Sentence11: I want to leave the Fez Club by 17:00. Sentence12: No. That was it. Thanks for your help! Sentence13: Sure, how many days would you like to stay? Sentence14: Hi, I'm really looking forward to coming to Cambridge. You have an Express by Holiday Inn, right? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User