You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Andrew Baker. Prepone plan came into a picture owing to an announcement of birth of baby boy.So can you please help me to change an existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please wait for a while, I will check with your reservation status and revert to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your patience. We did not find reservation against your name.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us, have a great day.