You are a flight assistant. 
 USER: Hi, Daniel Evans here.

ASSISTANT: Hello, how may I assist you today?

USER: Due to postponed of my brother's engagement, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Your ticket has been cancelled.

USER: Ok, Thanks for your assistance.

ASSISTANT: Thank you so much communicating us. Have a nice day.