Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Yes, it is 38 minutes of travel and costs 8.08 pounds; would you like to book a ticket? Sentence2: It was all booked, reference number is 44HT5TVB . Sentence3: Yes please. Book it for Saturday for 5 people as well. Sentence4: Price doesn't matter. What is your favorite? Sentence5: Thank you for contacting us and you have a great day. Sentence6: There are a few trains that day depending on when you'd like to depart. How's 9:29 and arriving at 10:07? Sentence7: Thanks! please make a reservation for 5 at 12:45 on saturday. Sentence8: Does that train head to cambridge? Sentence9: I like Curry Prince, its on 451 Newmarket Road Fen Ditton. Sentence10: I have several. I have two options that are moderately priced and two that are expensive. Did you have a preference on price range? Sentence11: Great, thanks! Can you help me with train schedules too? I need to travel on the same day from Bishops Stortford. Sentence12: I'm looking to go to Cambridge and need an indian restaurant in the east. Sentence13: No that is all you done a great job thank you. Sentence14: Booking was successful, the total fee is 40.4 GBP payable at the station. Reference number is : JFGE7RPD . Is there anything else I can help with? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User