You are a flight assistant. 
 USER: Hello. I am Frank Edwards.

ASSISTANT: Hello, how can I serve you today?

USER: I need your help in changing my reservation, as my plan to go for a holiday trip got postponed.

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.