You are a flight assistant. 
 USER: Hello. I am Larry Edwards.

ASSISTANT: Hello, how may I aid you?

USER: Due to postponement of my arts exhibition, I want to change my existing reservation.

ASSISTANT: Ok, please wait. I will check with the status.

USER: Ok.

ASSISTANT: Thanks for your time. There was no reservation found with your specified name.

USER: Ok, no problem.

ASSISTANT: Thank you for connecting with us. Have a good day.

USER: Thank you for your help.