You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am George Miller. I need to change my existing reservation, Can you please help me with that/.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a few minutes.

USER: Sure, make it fast.

ASSISTANT: Thank you for your time. We are sorry to say that there was no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for connecting with us.