You are a flight assistant. 
 USER: Hello. I am Edward Hernandez.

ASSISTANT: Hello, how can I aid you today?

USER: Aid me in changing my recent reservation which has done earlier.

ASSISTANT: Ok. Please wait for a moment, I will check the reservation with your name.

USER: OK.

ASSISTANT: I am here to inform you that, there were no reservation available with your name.

USER: Ok, not an issue. Thanks for your time.

ASSISTANT: Thank you for choosing us.