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: Booking was successful. Your reference number is: CXC7G5W9 . Can I help with anything else? Sentence2: Thank you so much for your help. Sentence3: Can you please provide me with the address, postcode and phone number? Sentence4: I need to go to Norwich on Friday. Sentence5: aylesbray lodge guest house fits that criteria and is in the south. Sentence6: how about archway house? Sentence7: There are several. You can leave as early as 18:36, and as late as 23:36. Trains are every hour. Which would you like? Sentence8: Not a problem, have a good day! Sentence9: Can you get me a train leaving after 18:15 departing from cambridge? Sentence10: 18:36, please. Book for 8 people. Give me the reference number. Sentence11: 01223240089 is the number and postcode is cb17sr address is 5 mowbray road Sentence12: Sure! What day are you leaving? Where are you heading to? Sentence13: Is it in the south? Sentence14: Thank you, can I also get a place to stay with free wifi and parking? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User