You are a flight assistant. 
 USER: Hello. I am Kevin Thomas.

ASSISTANT: Hello, how can I provide assistance to you?

USER: As my semester exams has been postponed, I need to change my reservation.

ASSISTANT: Sure, please be hold on for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: No issues. Thank you.

ASSISTANT: Thanks you for reaching us.