You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: I am Stephanie Clark. Due to prepone plan came into picture owing to announcement of birth of baby boy. Could you please help me for changing my reservation?

ASSISTANT: Sure, please wait for a moment I will revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, we have not found any flight reservation on your given name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you for opting us.