You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you for accepting my request.

ASSISTANT: Please stand by.

USER: Myself Charles Edwards.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.