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: What is the total travel time? And can I also get the departure time and a price please Sentence2: Can you book a table for 1 at 17:00 on Saturday there for me? Sentence3: Sure! I've booked it for Saturday at 17:00 for 1 person. Reference number is 57BVL3K7 . Sentence4: How much does this ticket cost? Thanks for your help! Sentence5: have a nice day. bye Sentence6: TR6210 arrives in Cambridge at 12:54 on Saturday. Would you like a ticket on that train? Sentence7: Please help me find a restaurant called Frankie and Bennys. Thanks. Sentence8: That train leaves at 11:09 and last a total of 105 minutes of travel. Sentence9: It is located at Cambridge Leisure Park Clifton Way Cherry Hinton Sentence10: It is 30.24 pounds. Sentence11: Yes. I'm coming in from leicester. Sentence12: Will you be traveling on Saturday? Sentence13: Thanks, I also need a train going to cambridge, arriving at 13:00, please. Sentence14: No thank you that will be all Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User