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'll be flying out of the country from stansted airport on Tuesday. I need to get there at least by 13:30 Sentence2: Thank you so much, that's all. Goodbye. Sentence3: I am actually looking for a train to Stansted Airport. Sentence4: Your reference number is 9IQ2K2DW . Sentence5: Friday, 4 nights. Reference number please. Sentence6: Thank you for using the Cambridge TownInfo centre, and enjoy your time in Cambridge! Sentence7: TR7293 will arrive there at 12:08. Sentence8: i am looking for information in Cambridge. Sentence9: On what day would you like to arrive? Sentence10: There's the allenbell, that's located in the east side of town at 517a coldham lane. Sentence11: Great. I also need a place to stay that is a cheap guesthouse. Sentence12: Can you please tell me where you will be departing from and what time and day? Sentence13: Please reserve a room for 1. Sentence14: What area are you wanting to stay? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System