You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Edward Turner want to change  my reservation due to prepone of my exams. Can you help me in changing?

ASSISTANT: Sure, please wait for a while, I will check the active reservation on your name and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, currently there is no active reservation found on your name.

USER: Ok , no problem. Thank you for your response.

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