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: Okay, what time do you need to leave by? Sentence2: I need to arrive by 16:45, departure is not as important. Sentence3: I am looking for train going to cambridge please. Sentence4: Perfect. Thank you so much! Have a great day! Sentence5: I would like to leave from the birmingham new street station please. On a Saturday. Sentence6: You are quite welcome. Is there anything else I can assist you with today? Sentence7: No that was all. Thanks Sentence8: Reference number is : PA6L738Y . Sentence9: Where are you planning to depart from? Sentence10: welcome. at your service next time Sentence11: You're very welcome! Have a great day! Bye! Sentence12: Booking was successful, the total fee is 180.24 GBP payable at the station for 3 tickets. Reference number is : 0UP7SB1H . Sentence13: Sorry, I should have specified but the booking needs to be for 3 people Sentence14: Thank you for your help Sentence15: How about TR3415 that arrives at 08:23? Sentence16: you can book it please. get me the reference number too Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User