You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Will you please assist me to change my existing reservation as my plan to meet my friend got postponed?

ASSISTANT: Sure, can I have your name please?

USER: Dennis Wright.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

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

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for reaching us.