Hello.
Hello, how can I guide you for today?
I would like to change my previous travel dates, which is done recently.  Can you please help me out?
I will help you with that.
Thank you for considering my request.
May I know your name?
Myself Steven Martin.
Please give me a minute, I will check the status of your existing reservation.
Sure, I will wait for your response.
Sorry, there is no reservation found under your name in our database.
Not a big problem. Thank you for the information.
Thank you for contacting us, have a nice day.