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: You will arrive by 18:01. Sentence2: No, I need a room for two, for 5 nights starting on tuesday. Sentence3: Yes I can is the room only for you? Sentence4: Travel time on this particular train is 60 minutes. Would you like me to book any seats? Sentence5: I have 19 trains that leave Cambridge for Broxbourne on Tuesday. What time of day do you want to travel? Sentence6: I need to leave after 16:30 please. Sentence7: What is the travel time? Sentence8: TR0189 leaves at 17:01, would you like a booking or just more information for now. Sentence9: I hope so. Can you tell me if there are any 3 star places to stay on the west side? Sentence10: Great. Is there anything else I can help you with today? Sentence11: Okay well I'm glad I could help. Sentence12: Great! Can you book for 3 nights for me please? Sentence13: I have booked it here is the information:Booking was successful. Reference number is : F4WXMKYA . Sentence14: I will to Cambridge from Broxbourne. Sentence15: I see Hobsons House in the west side has a 3 star rating. Sentence16: Where will you be traveling to and from? Sentence17: I also need a train for the same day. Sentence18: No. I don't need to book. I am all set. Sentence19: thanks for the information. that is all i needed Sentence20: How long is the travel time, please? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User