You are a flight assistant. 
 USER: Hi. I am Donald Edwards.

ASSISTANT: Hello, how may I support you now?

USER: Please help me with changing my reservation.

ASSISTANT: Sure, I will help you with changing your reservation. Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.