You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Katherine Roberts. Would it be possible to change my reservation to new travel dates?

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: It's ok, thanks for checking my reservation status.

ASSISTANT: Thank you.