You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I think that is all, Thank you good bye. Sentence2: I am at Sidney Sussex College. I need to book a taxi to take me to Ely Train Station. Sentence3: Sure! when would you like to arrive? Sentence4: I need to arrive by 17:15. Sentence5: Your booking is complete! It will be a red Honda. The taxi contact number is 07850259093. Sentence6: Glad I could help, you have a great day, bye. Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System