You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation as my tournament got postponed.

ASSISTANT: May I know your name please?

USER: I am Virginia Jones.

ASSISTANT: Just wait a minute, I will check and get back to you.

USER: Ok.

ASSISTANT: We are sorry to inform, unfortunately no reservation found on your providing name.

USER: No issues.

ASSISTANT: Thank you for reaching us help.

USER: Thank you.