You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help are you expecting from our agency?

USER: Prepone plan came into picture owing to announcement of birth of baby boy.

ASSISTANT: Ok.

USER: I had to request for this changing reservation with the name of Dorothy Harris.

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Give me a minute, I will check the previous list and let you know the details of it.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, no reservation found on your name.

USER: Thank you for your quick response.

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