You are a flight assistant. 
 USER: Hello, I am Michelle Taylor.

ASSISTANT: Hello, how can I help you today?

USER: Due to sudden changes, my exams has been postponed. Can you please help me to change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.