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 need a train out of cambridge on Sunday, please. Sentence2: Yes there are 4 options to choose from, do you have a specific part of town you'd prefer? Sentence3: We have trains leaving every hour starting at 05:00 that day. What is your destination? Sentence4: I have train TR3544 departing at 19:50 and arriving by 20:07. Would that work for you? Sentence5: ok, perfect, have a great day Sentence6: No that will be all. Sentence7: I'd also like to see some things in town, in particular any sort of boating. Is there anything like that? Sentence8: The Riverboat Georgina doesn't seem to have an entrance fee. Their postcode is cb41as, phone number 07807718591, and address 251a Chesterton Road. Do you need help with anything else? Sentence9: I found no records of an attraction involving boats near Ely. Would you like me to search for something else, or for boats in a different area? Sentence10: I need to go to ely , near a place that has a boat.What is the entrabnce fee ? Sentence11: Yes, what is the price of that train? Sentence12: Yes, please. Also, what is the entrance fee? Sentence13: The price is 3.52 pounds, would you like me to book a ticket for you? Sentence14: Riverboat Georgina is an excellent boat attraction in the north. Would you like the postcode and phone number? Sentence15: Actually, the part of town doesn't matter. I'd just like to take a boat ride or look at some boats, please. Sentence16: The train should go to ely and should leave after 19:15. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User