You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Prepone plan came into picture owing to announcement of birth of baby boy. Will you help me to change my existing reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Samantha Moore.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for opting us.