Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Is there anything else I can help you with today? Sentence2: No thank you, I have all the information I need on that. Thank you! Sentence3: Are there any trains leaving Sunday that arrive by 11:30? Sentence4: No, that's all I needed, thank you so much! Sentence5: The regency gallery is a museum in the centre. It is located at 39 fitzroy street. Admission is free. May I help you with anything else? Sentence6: There are two are available TR6003 leaving at 05:11 and arriving at 05:58 and TR0412 leaving at 06:11 and arriving at 06:58. Would you like me to book either one? Sentence7: There are many trains to choose from, where are you looking to depart from? Sentence8: Happy to be of service. Enjoy your time in Cambridge! Sentence9: Kings Lynn, to Cambridge. Sentence10: Yes I am looking for information on the regency gallery. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System