You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best can I guide you today?

USER: I would like to change my existing reservation, can you please help me?

ASSISTANT: Sure, can I know your good name?

USER: Kathleen Jones.

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.

ASSISTANT: Thank you.