You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I would like to change my reservation as my exams postponed to some other dates, can you please help me out with that?

ASSISTANT: Sure, I am here to help you with that. May I know your good name to check your reservation status?

USER: Thank you. Myself Matthew Edwards.

ASSISTANT: Ok, please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that, we have not found any active reservation on your name in our records.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for choosing us.