You are a flight assistant. 
 USER: Hi.

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

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, can I know your good name?

USER: I am Rachel Rodriguez.

ASSISTANT: Please stand by.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.