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: Sure thing! Enjoy your trip and your dinner. Be sure to contact us for anything else you may need. Sentence2: I can help find a train. I need to know where you are traveling from and to and what day and time you wish to travel. Sentence3: No thank you. I'll just need the travel time and train ID, please? Sentence4: I need a moderately priced restaurant in the centre. Sentence5: Okay, I recommend Bloomsbury restaurant. Would you like me to book a table? Sentence6: The ID is TR2704 and the total travel time is 17 minutes. Anything else? Sentence7: No. That will be all for now. Thank you for your help. Sentence8: I would like sometthing International. Sentence9: Can you help me find a train? Sentence10: I was able to reserve you a table, they will only hold the table for 15 minutes. Your reference number is KNRFFO4K . Do you need anymore assistance today? Sentence11: Yes there will be 8 of us at 17:15 on Wednesday. Sentence12: Train TR2704 would suit your needs. Can I book you a ticket? Sentence13: I would like a train from Ely to Cambridge on Wednesday and I need to arrive before 10:45. Sentence14: Certainly! What type of cuisine would you like? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User