You are a flight assistant. 
 USER: Hello. Myself Stephanie Hill.

ASSISTANT: Hello. How can I aid you Hill?

USER: Actually my final examination is postponed so that I want to change my existing reservation. Can you please help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your own time.

ASSISTANT: Sorry Stephanie Hill, no reservation found on your name in our records.

USER: No problem.

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

USER: Thank you for your information.