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: Those days are booked would you like to try a different hotel? Sentence2: Yes, I would like to book it. Sentence3: Okay, your booking was successful. The total fee is 89.5 GBP which can be paid at the station. Your reference number is STB4RJ95 . Sentence4: I'm glad I could help you today. Goodbye. Sentence5: That's fine I didn't actually need one. I don't need anything else. That's it. Thanks and bye! Sentence6: starting on what day please? Sentence7: There are four trains running from Broxbourne to Cambridge that night, every hour starting at 20:32. Would you like to make a booking? Sentence8: Thanks! I'm also looking for moderately-priced 4-star accommodations in the north. Sentence9: And where will you be leaving from and what time and on what day please? Sentence10: How many nights would you like to book it for? And will this be for 5 people? Sentence11: Booking was successful. Reference number is : GVD2TJSE . Sentence12: I need to depart broxbourne to cambridge leaving after 20:00 on thursday Sentence13: acorn guest house would suits your needs. Can I get you a booking? Sentence14: Yes, I need 5 tickets please. Sentence15: You're in the right place! What can I help you with. Sentence16: Have a great day. Sentence17: Can you check one more time? Sentence18: Thank you I appreciate it. Sentence19: It's about time, thanks. That is everything I need. Sentence20: Nope, that will be all for now, thanks! Sentence21: Can I assist you with anything else today? Sentence22: I am planning a trip in Cambridge Sentence23: I want to find out a train schedule for trains leaving from Broxbourne. Sentence24: Starting on thursday night please. Sentence25: One moment i need to located a hair salon near the hotel can you assist me? Sentence26: Sorry I could not find a salon nearby. Sentence27: Yes, for 5 people and for 2 nights please. Sentence28: I will work on booking this and be right back with you. Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User