You are a flight assistant. 
 USER: Hello, I am Gary Johnson.

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

USER: I would like to amend my reservation to the next following month, could you help me with that?

ASSISTANT: Sure Gary, I am here to help you out. Please allow me a moment to check whether any active reservation found on your name or not.

USER: Take your time.

ASSISTANT: Sorry Gary, there is no active reservation on your name to amend it.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.