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: I am departing from cambridge and going to stansted airport. Sentence2: Hello, I need a train, please. Sentence3: Ok, what was the address for that place? Sentence4: Good day to you too. Sentence5: Sounds good. Now I'm looking to go to a particular attraction called Kambar, it's in the area, right? Sentence6: The price is 10.10 pounds and the duration is 28 minutes. Sentence7: Alright, thank you, that should be all for today. Sentence8: I need to leave on friday after 9:15 Sentence9: please tell me your destination and the time you wish to arrive. Sentence10: What is the price and travel time? Sentence11: You've been very helpful, good day Sentence12: Kambar is a nightclub that is located in the centre area. It has a 5 pounds entrance fee. Sentence13: The address for Kambar is 1 Wheeler Street. Sentence14: It was a pleasure to help you. Have fun. Sentence15: I have train TR2048 departing Cambridge at 9:40 and arriving at 10:08. Would you like me to book this for you? Sentence16: Where are you departing from and where are you going? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User