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: You're quite welcome, have a lovely trip! Sentence2: Can you book it for 4 people at 13:15 on wednesday? Sentence3: I would like you to book me four tickets. Sentence4: Sure. There are many trains that day, do you have a specific destination and departure time in mind? Sentence5: Hello, have you heard of the Royal Spice Restaurant by chance? Sentence6: yes that sounds great. Can I get a reference number for that please Sentence7: The same day as the restaurant booking I am going to cambridge and need to arrive there by 09:30. Sentence8: Okay, where would you like to leave from? Sentence9: I have! It serves indian food in the north part of town. Would you like more information? Sentence10: I was able to book you 4 tickets on that train. Your reference number is Y381CZMK . Is there anything more I can help with? Sentence11: I would like to leave from Stevenage Sentence12: I think you took care of everything. Thanks. Take care now. Bye bye. Sentence13: I've got the TR8723 leaving Stevenage and arriving in Cambridge by 08:43. Would that work? Sentence14: I have successfully booked you a table for 4 at 13:15. The table will be reserved for 15 minutes. The reference number is PRXYMNLC . Sentence15: How many tickets would you like me to book? Sentence16: Thanks so much. Could you also help me find a train, for that same day? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User