You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: Sure, we are here to help you.

USER: Myself John Hernandez.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing our services.