You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jonathan Taylor.

ASSISTANT: How can I aid you today?

USER: I want to change my existing reservation, please help me out.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: No issues, thanks for the information.

ASSISTANT: Thank you.