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: TR7024 is the first train after 10:30 it leaves after 11:21, would you like me to book you? Sentence2: I will be leaving from Cambridge. Sentence3: That's fine I need 4 tix and the ref # Sentence4: Where will you be leaving from? Sentence5: That sounds great! Can I get the postcode? And then I need to find a train. Sentence6: The postcode is cb58as. What day and time will you be travelling on? Sentence7: I will get that for you Sentence8: The adc theatre is very good would you like that one? Sentence9: Nope, choose the one you think is best and let me know the postcode please. Sentence10: That sounds like fun. I've found five theaters in town. Four of them in the center of town, one to the south. Do you have any other criteria? Sentence11: We would like to attend an event at the theatre while we are in town. Sentence12: What time would you like to arrive by? Sentence13: I am going to stevenage on thursday. Sentence14: I would like to leave after 10:30. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System