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: How many tickets do you need? Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : LLBY85ZO . Do you need anything else? Sentence3: Hello, I'd like some information on a train going to leicester. Sentence4: I will need 7 tickets. Sentence5: Train TR0776 arrives in Leicester at 20:06. It departs Cambridge at 18:21. Would you like to book this? Sentence6: Yes can you please and send me the reference number. Sentence7: I need to arrive by 20:45 Sentence8: Reference number is : XCUCXU2M . Will you need any more help? Sentence9: I need to travel on Tuesday. Can I get the Train ID and travel time? Thank you so much! Sentence10: I will need a restaurant for 7 people at 12:45 on the same day at graffiti. Sentence11: no that's all thanks a lot Sentence12: Almost there, Ive got the time and route in, but never got a date, what day will you need this? Sentence13: Happy to help. Goodbye. Sentence14: Do you know when you will be traveling? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User