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: Thank you. I also need a train on wednesday arriving by 17:00. Sentence2: No, I just need to arrive by 17:00. On Wednesday. Please book the train closest to that arrival for 4 people and give me a reference number Sentence3: I would like to depart from Kings Lynn. Sentence4: Booking was successful.Reference number is : OEBH1Q9H . Sentence5: Yes please book it for 4 people and 5 nights starting from Wednesday. Sentence6: Is there a time in your mind for leaving? Sentence7: The Train ID is TR5153. It leaves at 16:11 and arrives at 16:58. Your reference number is 1T9WEZTE . Can I help with anything else? Sentence8: Awesome, thank you so much for your help! That will be all, goodbye. Sentence9: Okay! Alexander Bed and Breakfast is a cheap, 4-star guesthouse in the Centre of town, at 56 Saint Barnabas Road, with internet and parking. Shall I book a room? Sentence10: Where would you like to depart from? Sentence11: I'm looking for information on a hotel called alexander bed and breakfast. Sentence12: Thank you and enjoy your time in our beautiful city! Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System