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: Glad I could help, hope you have a great trip! Sentence2: I have two. Shall I book one for you? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : XEP4E22B . Will there be anything else today? Sentence4: Can you book that one for 6 people? Sentence5: Thank you, thats all I need today. Sentence6: The same day, saturday. Sentence7: What day do you want it for, before I confirm the booking? Sentence8: I also need a place to eat, I would like it in the west and expensive. Sentence9: Hi, I'm looking to book a train out of Cambridge that I want to arrive in Ely. Can you assist me with finding times and dates? Sentence10: There are 9 expensive restaurants in the west. Are you looking for a particular type of food? Sentence11: You could take TR8860 early Saturday at 05:50. It's a short trip of 17 minutes and costs 3.52 pounds. Will this work for you? Sentence12: Yes, I have made the booking for you. Your reference number is 1K560JNY . Sentence13: There are 70 trains traveling to Ely from Cambridge between Friday and Wednesday. What day do you want to travel? Sentence14: I would like to leave on Saturday. Sentence15: Yes. British food please. Sentence16: Yes, I need a table for 6 people at 10:30 on Saturday and please provide the reference number after booking is completed. Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User