You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my existing reservation. Can you help me for that one?

ASSISTANT: Sure, please share your good name?

USER: Sure, Carolyn White here.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you.