Hello.
Hello. How can I assist you at this moment?
I want to change my travel dates in my previous reservation, can you help me with that?
Sure, I will help you with changing your reservation.
Thank you.
Can I have your name please for checking your reservation status?
Sure, my name is Jerry Wilson.
Ok, please wait a moment.
Ok.
Sorry Jerry Wilson, no reservation has found under your name to change.
Oh! It's ok no problem. Thank you for your information.
Thank you for choosing us, have  a good day.