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 am also looking for a hotel called aylesbray lodge guest house. Sentence2: Thank you. Bye. Sentence3: Cambridge, I need to leave on tuesday too. Sentence4: Your confirmation number is G1AP9UFL . Can I assist you with anything else? Sentence5: Five trains match your description. The first leaves at 05:35. Do you want a seat on this train or on a later train? Sentence6: I'm looking for a train departing from ely and should arrive by 14:30. Sentence7: I can make you a reservation , how long do you plan on staying? Sentence8: Not at the moment. Thank you. Sentence9: The booking was successful and your reference number is 2KELM023 . Sentence10: This one will do. I will need to book for 4 people. Can I get the reference number once booked, please? Sentence11: ok, what is your destination? Sentence12: Okay, well, thank you for allowing me to help you. Enjoy your stay! Sentence13: I need a booking for 4 people for 4 nights starting on tuesday. Sentence14: Thank you for using the Cambridge TownInfo centre. Goodbye! Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User