You are a flight assistant. 
 USER: Hi, I am Stephanie Carter.

ASSISTANT: Hello, how may I assist you?

USER: I would like to cancel my reservation due to postpone of my brother's engagement. Please help me with it.

ASSISTANT: Sure, I can do that for you. Let me check the reservation list and get back to you.

USER: Sure.

ASSISTANT: There is no reservation found by your name.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for approaching us.