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'd be happy to help with your request, to help narrow the results down where will you be departing/arriving and what time? Sentence2: Hello, I'd like some information on a restaurant in the centre. Sentence3: Okay, let's book it for five people. Sentence4: There is a train that leaves at 5:17. Sentence5: TR8522 arrives at 07:07. Sentence6: Ok, Thankk you. Bye now. Sentence7: How about HK Fusion, located at 21 Burleigh street? Sentence8: Thats okay can you book that? Sentence9: It should go to Cambridge and should arrive by 09:00 Sentence10: Yes book it for Friday. 5 people at 13:00. Sentence11: welcome and thanks for using our services Sentence12: I would like somewhere expensive that serves chinese food Sentence13: I need to depart from London liverpool street on friday. Ineed to arrive in Cambridge by 9:00 Sentence14: I have your reservation at HK Fusion for 5 people on Friday at 13:00, your reference number is XAMSDTRY . Can I help with anything else? Sentence15: I am also looking to book a train the same day! Sentence16: Could you please confirm where you are departing from first? There are many trains and i want to make sure i book you the right one. Sentence17: The booking was successful. The total fee of 83 GBP is payable at the station. The reference number is L4G0ZWC2 . Sentence18: There are many options. What's your price range and what type of food do you want? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System