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 want to arrive by 15:45 Sentence2: Kings Lynn. I need 5 tickets and my reference number Sentence3: My arrival destination is Cambridge. Sentence4: Any more details you would like to provide? The TR7423 leaves Cambridge on Sunday at 5, heads to London Kings Corss and arrives at 5:51. Sentence5: Train TR2257 has been booked for 5 seats. Your reference number is E720WBAI . Can I assist you with anything else today? Sentence6: Okay when would you like to leave by? Sentence7: There are many trains running on Monday, what is your arrival destination? Sentence8: I would like to travel on Sunday please. Sentence9: Yes that would be great also I need the reference number after you book it. Sentence10: TR2257 will arrive at 14:58. Should I go ahead and book 5 tickets for this train? Sentence11: I'm sorry, my booking system seems to be down. Can you try again later? Sentence12: That won't be a problem. Can you please provide me with some addition details? For example, what day and time you'd like to travel? Sentence13: I could use some help finding a train for my stay with you. Sentence14: Thank you for using our service today! Sentence15: Oops. Sorry. My travel day is Monday not Sunday. What do you have for that day. Sentence16: Yea that is okay THank you Sentence17: no thanks that's all Sentence18: What is your departure site? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System