You are a flight assistant. 
 USER: Hello. I am Gary Carter.

ASSISTANT: Hello, Gary Carter, how can I support you today?

USER: Due to my interview has been postponed, I want to change my recent reservation. Can you assist me with that?

ASSISTANT: Sure, we are here to assist you. Please wait for a moment, I will check the status and notify you.

USER: Sure, I will wait.

ASSISTANT: Thanks for your patience, we are sorry to inform you that no reservation has found based on your specified name.

USER: Ok, not an issue.

ASSISTANT: Thanks for availing our service, have a great day.

USER: Thanks for your service.