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'm departing from Kings Lynn. I'll need to arrive by 9:15. Sentence2: Okay and where will you be departing from? Sentence3: I am planning a trip in Cambridge Sentence4: Yes, I need to book a train to cambridge on that same day. Sentence5: There is only 1 and its called the royal standard would you like to reserve a table? Sentence6: Booking was successful, the total fee is 39.2 GBP payable at the station, your reference number is JB48YR5T . Will that be all for today? Sentence7: Done! Your reference number is N8IPCZJP . Do you need help with anything else? Sentence8: Yeah that works. Can you book train reservations on that train for the same group of 4 people? Sentence9: Is there a certain type of restaurant you are looking for? Sentence10: Have a great trip. Sentence11: No that will be all. Thank you. Sentence12: The train that arrives closest to 09:15 is TR1797. It arrives by 08:58 will that work for you? Sentence13: I have heard of gastropub food but never tried it before. Would you have anything like that in the east? Sentence14: Sure can you book a table for 4 at 14:45 on friday? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User