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: The train that will have you arrive closest to the time of 16:45 is TrainID TR9024. Would you like me to secure a reservation? Sentence2: I was happy to help you today. Please contact us again, if you need further assistance. Good-bye. Sentence3: I can help with that. What is the date and time you would like to leave? Sentence4: No that will be all! Thank you! Sentence5: Yes. May I please get the phone number to Churchill College? Sentence6: How many tickets do you need? Sentence7: I want a train leaving on sunday. Sentence8: I would recommend Churchill College on Storey's Way. They have free admission. Would you like anything else? Sentence9: I changed my mind, don't worry about getting me a train reservation. Just please recommend an attraction to visit on the West side of town Sentence10: Yes please. And can I have the reference number? Sentence11: Yes the number is 01223336233. Is there anything else you need assistance with today? Sentence12: I need to leave cambridge and go to kings lynn and arrive by 16:45 on sunday Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User