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 about the same day at 12:30? If that works, please send the reference number. Sentence2: Thank you very much for your help. Sentence3: Okay! Thank you for calling. Sentence4: Unfortunately we cannot book at that time, could you choose another day or time please? Sentence5: I need the train to leave on Sunday. Sentence6: Okay, I got one leaving at 5:17 and another at 7:17, do you have a preference? Sentence7: No, that was everything, thank you! Sentence8: I want to book the reservation the same day as my train at 13:30 for 8 people. Sentence9: I can book you on train number TR4543. It departs at 07:17 and arrives in Cambridge at 8:08. Sentence10: I'd like to depart from London kings cross Sentence11: 7:17 please. I would like to book for 8 people and i need the reference number. I would also like to book at Bangkok City restaurant. Sentence12: There are 231 trains that arrive in Cambridge before 8:45, can you tell me where you want to depart from to narrow it down? Sentence13: okay is there anything else i can help you with? Sentence14: I would like a ticket to a train that arrives in Cambridge before 8:45am. Sentence15: No, my mistake. Thank you. Sentence16: It works. The reference number is YRIP8V3C . Anything else I can do for you? Sentence17: You would like an additional reservation at Bangkok city restaurant? Sentence18: i would also like to book a reservation at bangkok city. Sentence19: Good day then. Sentence20: I've booked the train. Your reference number is YRIP8V3C . For what day and time would you like the restaurant reservation? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System