You are a flight assistant. 
 USER: Hi, I am Larry Parker.

ASSISTANT: Hello, how may I assist  you?

USER: My trip for visitation has been postponed, can you please change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a pleasant day.

USER: Thank you for your response.