You are a flight assistant. 
 USER: Hello. I am Stephanie Moore.

ASSISTANT: Hello. How can I help you?

USER: Please help me to change my reservation as my meeting was got postponed?

ASSISTANT: Sure, I willing to help you. Please wait.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry we didn't find any reservation on your name.

USER: Ok, no problem.

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

USER: Thank you.