You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Justin Green. I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Justin Green, there is no reservation on your name in our database.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.