You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I want to change my reservation due to postponed of my Client meeting, so please assist me to change.

ASSISTANT: Sure, may I know your name to check the status of your reservation and revert you.

USER: Sure, my name is Amanda Jones.

ASSISTANT: We could not find any active reservation by the name in our data base.

USER: No issues, thanks for your kind service.

ASSISTANT: Thank you for reaching us.