You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am James Edwards. My exam has been postponed, help me in changing my reservation.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks or waiting, no reservation found with your name to change the reservation.

USER: No issues, thank you for your quick response.

ASSISTANT: Thanks for contacting us.