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: OK - what day and time do you want to travel? Sentence2: The departure time is all I need. Sentence3: I am wanting to go from Stevenage to Cambridge. Sentence4: I need to find a train. Sentence5: I don't care, anywhere in town is fine. Sentence6: Have a nice day. Sentence7: I would like to go to a theatre in town. How many are there and where are they? Sentence8: What area in town would you like to go to? Sentence9: I am glad we were able to help you today. Have a good day. Sentence10: Okay- from where to where? Sentence11: i suggest the junction. it is in south. can i give you the address? Sentence12: No, thank you that is all. Sentence13: Sure. What is the Address, phone number and postcode? Sentence14: The TR4800 meets your criteria. How many tickets would you like? Sentence15: The address is clifton way and the postcode is cb17gx. Their phone number is 01223511511. Do you need anything else? Sentence16: I want to leave on Friday and should arrive by 10:45 Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System