You are a flight assistant. 
 USER: Hello. I am Donald Baker.

ASSISTANT: Hello, how can I aid you?

USER: Prepone plan came into picture owing to an announcement of birth of baby girl.So I need to cancel my recent reservation.

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  We found reservation on your name and it is cancelled.

USER: Thank you for your kind help.

ASSISTANT: Thank you for availing us.