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: Your reservation is all set! Your reference number is WFOQFQ2P . Is there anything else I can help you with? Sentence2: There are two options. Both are expensive. Do you have a preference for area? Sentence3: I'm wondering if you have information about a particular restaurant called the curry queen? Sentence4: My preferred type is a hotel, and I want it to have parking and internet as well as a 3 star rating. Sentence5: I was able to book the gonville your reservation number is LANIULI7, anything else I can help you with today? Sentence6: Awesome, you've been a great help. Thank you. Sentence7: Do you have a price range or area you would like to stay? Sentence8: I'm happy to help, and I hope you enjoy your time in Cambridge! Sentence9: Need to book a hotel as well. Sentence10: No I have no preference. I would like to book it same day for 7 people and 4 nights. I would need the reference number once it is complete. Sentence11: The curry queen is an expensive restaurant located in centre. Would you like me to book a table for you? Sentence12: Yes, a table for 7 at 12:45 on Sunday. Sentence13: I'm sorry, I am unable to book it right now. Sentence14: Are you sure? Can you try both of them? I really need 4 nights, starting sunday for 7 people. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User