You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you aid me in changing my recent reservation, which I had done before?

ASSISTANT: May I know your name?

USER: Myself Gary Wright.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.